Wednesday, May 4, 2011

Mount Everest
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Mount Everest
Nepali: सगरमाथा
Chomolungmaཇོ་མོ་གླང་མ
Qomolangma 珠穆朗玛峰

Everest from Kala Patthar in Nepal
Elevation 8,848 m (29,029 ft) [1]
Ranked 1st
Prominence 8,848 m (29,029 ft) 
Notice special definition for Everest.
Listing Seven Summits
Eight-thousander
Country high point
Ultra
Location
Mount Everest is located in Nepal
Mount Everest
Location on the Sagarmatha Zone, Nepal – Tibet, China border
Location Nepal Solukhumbu District, Sagarmatha Zone, Nepal
People's Republic of China Tingri County, Xigazê Prefecture, Tibet Autonomous Region, People's Republic of China[2]
Range Mahalangur Himal, Himalayas
Coordinates 27°59′17″N 86°55′31″E / 27.98806°N 86.92528°E / 27.98806; 86.92528Coordinates: 27°59′17″N 86°55′31″E / 27.98806°N 86.92528°E / 27.98806; 86.92528[3]
Climbing
First ascent 29 May 1953
New Zealand Edmund Hillary
Nepal Tenzing Norgay
Easiest route South Col (Nepal)

Mount Everest -- also called Mount Chomolungma in Tibetan and Sagarmāthā (Nepali: सगरमाथा) -- is the world's highest mountain at 8,848 metres (29,029 ft) above sea level . Everest is in the Mahalangur section of the Himalaya on the Nepal-China (Tibet) border. Its massif includes neighboring peaks Lhotse 8516m, Nuptse 7855m and Changtse 7580m.

In 1856, the Great Trigonometric Survey of British India established the first published height of Everest, then known as Peak XV, at 29,002 ft (8,840 m). In 1865, Everest was given its official English name by the Royal Geographical Society upon recommendation of Andrew Waugh, the British Surveyor General of India at the time, who named it after his predecessor in the post, and former chief, Sir George Everest.[4] Chomolungma had been in common use by Tibetans for centuries, but Waugh was unable to propose an established local name because Nepal and Tibet were closed to foreigners.

The highest mountain in the world attracts many well-experienced mountaineers as well as novice climbers who are willing to pay substantial sums to professional mountain guides to complete a successful climb. The mountain, while not posing substantial technical climbing difficulty on the standard route (other eight-thousanders such as K2 or Nanga Parbat are much more difficult), still has many inherent dangers such as altitude sickness, weather, and wind.

By the end of the 2008 climbing season, there had been 4,102 ascents to the summit by about 2,700 individuals.[5] Climbers are a significant source of tourist revenue for Nepal, whose government also requires all prospective climbers to obtain an expensive permit, costing up to US$25,000 per person.[6] By the end of 2009 Everest had claimed 216 lives,[5] including eight who perished during a 1996 storm high on the mountain. Conditions are so difficult in the death zone (altitudes higher than 8,000 m/26,246 ft) that most corpses have been left where they fell. Some of them are visible from standard climbing routes.[7]
Contents
[hide]

* 1 Identifying the highest mountain
* 2 Naming
* 3 Measurement
o 3.1 Comparisons
* 4 Climbing routes
o 4.1 Southeast ridge
o 4.2 Northeast ridge
* 5 Ascents
o 5.1 Early expeditions
o 5.2 First successful ascent by Tenzing and Hillary
o 5.3 First ascents without supplemental oxygen and first solo ascent
o 5.4 First winter ascent
o 5.5 1996 disaster
o 5.6 2005: Helicopter landing
o 5.7 2006: David Sharp controversy
o 5.8 Various records
* 6 Death zone
* 7 Using bottled oxygen
* 8 Thefts and other crimes
* 9 Flora and fauna
* 10 Geology
* 11 See also
* 12 References
* 13 Further reading
* 14 External links

[edit] Identifying the highest mountain
Mount Everest is located in Earth
Location on Earth
Mount Everest relief map

In 1808, the British began the Great Trigonometric Survey of India to determine the location and names of the world's highest mountains. Starting in southern India, the survey teams gradually moved northward using giant 500 kg (1,100 lb) theodolites (each requiring 12 men to carry) to measure heights as accurately as possible. They reached the Himalayan foothills by the 1830s, but Nepal was unwilling to allow the British to enter the country because of suspicions of political aggression and possible annexation. Several requests by the surveyors to enter Nepal were turned down.[8]

The British were forced to continue their observations from Terai, a region south of Nepal which is parallel to the Himalayas. Conditions in Terai were difficult owing to torrential rains and malaria—three survey officers died from malaria while two others had to retire owing to failing health.[8]

Nonetheless, in 1847, the British pressed on and began detailed observations of the Himalayan peaks from observation stations up to 240 km (150 mi) away. Weather restricted work to the last three months of the year. In November 1847, Andrew Waugh, the British Surveyor General of India made several observations from Sawajpore station located in the eastern end of the Himalayas. Kangchenjunga was then considered the highest peak in the world, and with interest he noted a peak beyond it, some 230 km (140 mi) away. John Armstrong, one of Waugh's officials, also saw the peak from a location further west and called it peak 'b'. Waugh would later write that the observations indicated that peak 'b' was higher than Kangchenjunga, but given the great distance of the observations, closer observations were required for verification. The following year, Waugh sent a survey official back to Terai to make closer observations of peak 'b', but clouds thwarted all attempts.[8]

In 1849, Waugh dispatched James Nicolson to the area. Nicolson made two observations from Jirol, 190 km (120 mi) away. Nicolson then took the largest theodolite and headed east, obtaining over 30 observations from five different locations, with the closest being 174 km (108 mi) away from the peak.[8]

Nicolson retreated to Patna on the Ganges to perform the necessary calculations based on his observations. His raw data gave an average height of 9,200 m (30,200 ft) for peak 'b', but this did not consider light refraction, which distorts heights. The number clearly indicated, however, that peak 'b' was higher than Kangchenjunga. However, Nicolson came down with malaria and was forced to return home, calculations unfinished. Michael Hennessy, one of Waugh's assistants, had begun designating peaks based on roman numerals, with Kangchenjunga named Peak IX, while peak 'b' now became known as Peak XV.[8]

In 1852, stationed at the survey's headquarters in Dehradun, Radhanath Sikdar, an Indian mathematician and surveyor from Bengal, was the first to identify Everest as the world's highest peak, using trigonometric calculations based on Nicolson's measurements.[9] An official announcement that Peak XV was the highest was delayed for several years as the calculations were repeatedly verified. Waugh began work on Nicolson's data in 1854, and along with his staff spent almost two years working on the calculations, having to deal with the problems of light refraction, barometric pressure, and temperature over the vast distances of the observations. Finally, in March 1856 he announced his findings in a letter to his deputy in Kolkata. Kangchenjunga was declared to be 28,156 ft (8,582 m), while Peak XV was given the height of 29,002 ft (8,840 m). Waugh concluded that Peak XV was "most probably the highest in the world".[8] Peak XV (measured in feet) was calculated to be exactly 29,000 ft (8,839.2 m) high, but was publicly declared to be 29,002 ft (8,839.8 m). The arbitrary addition of 2 ft (61 cm) was to avoid the impression that an exact height of 29,000 feet (8,839.2 m) was nothing more than a rounded estimate.[10]
[edit] Naming

With the height now established, what to name the peak was clearly the next challenge. While the survey was anxious to preserve local names if possible (e.g. Kangchenjunga and Dhaulagiri), Waugh argued that he could not find any commonly used local name. Waugh's search for a local name was hampered by Nepal and Tibet's exclusion of foreigners. Many local names existed, with perhaps the best known in Tibet for several centuries being Chomolungma, which had appeared on a 1733 map published in Paris by the French geographer D'Anville. However, Waugh argued that with the plethora of local names, it would be difficult to favour one name over all others. So, he decided that Peak XV should be named after George Everest, his predecessor as Surveyor General of India.[8][11] He wrote:

I was taught by my respected chief and predecessor, Colonel Sir George Everest to assign to every geographical object its true local or native appellation. But here is a mountain, most probably the highest in the world, without any local name that we can discover, whose native appellation, if it has any, will not very likely be ascertained before we are allowed to penetrate into Nepal. In the meantime the privilege as well as the duty devolves on me to assign...a name whereby it may be known among citizens and geographers and become a household word among civilized nations.[12]

George Everest opposed the name suggested by Waugh and told the Royal Geographical Society in 1857 that Everest could not be written in Hindi nor pronounced by "the native of India". Waugh's proposed name prevailed despite the objections, and in 1865, the Royal Geographical Society officially adopted Mount Everest as the name for the highest mountain in the world.[8] Interestingly, the modern pronunciation of Everest English pronunciation: /ˈɛvərɨst, ˈɛvrɨst/[13] is in fact different from Sir George's pronunciation of his surname, which was /ˈiːvrɨst/.[14]
Aerial view of Mount Everest from the south

The Tibetan name for Mount Everest is Chomolungma or Qomolangma (ཇོ་མོ་གླིང་མ, which means "Saint Mother"), phonetically transliterated into Chinese as Zhūmùlǎngmǎ Fēng (simplified Chinese: 珠穆朗玛峰; traditional Chinese: 珠穆朗瑪峰), or translated by meaning as Shèngmǔ Fēng (simplified Chinese: 圣母峰; traditional Chinese: 聖母峰), literally "Holy Mother". According to English accounts of the mid-19th century, the local name in Darjeeling for Mount Everest was Deodungha (meaning "holy mountain").[15]

In the late 19th century, many European cartographers incorrectly believed that a native name for the mountain was Gaurisankar.[16] This was a result of confusion of Mount Everest with Gauri Sankar, which, when viewed from Kathmandu, stands almost directly in front of Everest.[citation needed]

In the early 1960s, the Nepalese government gave Mount Everest the official name Sagarmāthā (सगरमाथा).[17] This name had not previously been used; the local inhabitants knew the mountain as Chomolungma. The mountain was not known and named in ethnic Nepal (that is, the Kathmandu valley and surrounding areas).[citation needed] The government set out to find a Nepalese name for the mountain because the Sherpa/Tibetan name Chomolungma was not acceptable, as it would have been against unification (Nepalization) of the country.[citation needed]

In 2002, the Chinese People's Daily newspaper published an article making a case against the continued use of the English name for the mountain in the Western world, insisting that it should be referred to by its Tibetan name. The newspaper argued that the Chinese use of the Tibetan name preceded the English one, as Mount Qomolangma was marked on a Chinese map more than 280 years ago.[18]
[edit] Measurement
Another aerial view of Mount Everest from the south, with Lhotse in front and Nuptse on the left

In 1856, Andrew Waugh announced Everest (then known as Peak XV) as 29,002 ft (8,840 m) high, after several years of calculations based on observations made by the Great Trigonometric Survey.

The 8,848 m (29,029 ft) height given in this article is officially recognised by Nepal and China.[19] On 9 October 2005, after several months of measurement and calculation, the Chinese Academy of Sciences and State Bureau of Surveying and Mapping officially announced the height of Everest as 8,844.43 m (29,017.16 ft) with accuracy of ±0.21 m (0.69 ft). They claimed it was the most accurate and precise measurement to date.[20] This height is based on the actual highest point of rock and not on the snow and ice covering it. The Chinese team also measured a snow/ice depth of 3.5 m (11 ft),[21] which is in agreement with a net elevation of 8,848 m (29,029 ft). The snow and ice thickness varies over time, making a definitive height of the snow cap impossible to determine.

The elevation of 8,848 m (29,029 ft) was first determined by an Indian survey in 1955, made closer to the mountain, also using theodolites.[citation needed] It was subsequently reaffirmed by a 1975 Chinese measurement 8,848.13 m (29,029.30 ft).[21] In both cases the snow cap, not the rock head, was measured. In May 1999 an American Everest Expedition, directed by Bradford Washburn, anchored a GPS unit into the highest bedrock. A rock head elevation of 8,850 m (29,035 ft), and a snow/ice elevation 1 m (3 ft) higher, were obtained via this device.[22] Although it has not been officially recognized by Nepal,[23] this figure is widely quoted. Geoid uncertainty casts doubt upon the accuracy claimed by both the 1999 and 2005 surveys.

A detailed photogrammetric map (at a scale of 1:50,000) of the Khumbu region, including the south side of Mount Everest, was made by Erwin Schneider as part of the 1955 International Himalayan Expedition, which also attempted Lhotse. An even more detailed topographic map of the Everest area was made in the late 1980s under the direction of Bradford Washburn, using extensive aerial photography.[24]

It is thought that the plate tectonics of the area are adding to the height and moving the summit northeastwards. Two accounts suggest the rates of change are 4 mm (0.16 in) per year (upwards) and 3 to 6 mm (0.12 to 0.24 in) per year (northeastwards),[22][25] but another account mentions more lateral movement (27 mm/1.1 in),[26] and even shrinkage has been suggested.[27]
[edit] Comparisons

The summit of Everest is the point at which the Earth's surface reaches the greatest distance above sea level. Several other mountains are sometimes claimed as alternative "tallest mountains on Earth". Mauna Kea in Hawaii is tallest when measured from its base;[28] it rises over 10,200 m (6.3 mi) when measured from its base on the mid-ocean floor, but only attains 4,205 m (13,796 ft) above sea level.

By the same measure of base[28] to summit, Mount McKinley, in Alaska, is also taller than Everest. Despite its height above sea level of only 6,193.6 m (20,320 ft), Mount McKinley sits atop a sloping plain with elevations from 300 m (980 ft) to 900 m (3,000 ft), yielding a height above base in the range of 5,300 to 5,900 m (17,400 to 19,400 ft); a commonly quoted figure is 5,600 m (18,400 ft).[29] By comparison, reasonable base elevations for Everest range from 4,200 m (13,800 ft) on the south side to 5,200 m (17,100 ft) on the Tibetan Plateau, yielding a height above base in the range of 3,650 to 4,650 m (11,980 to 15,260 ft).[24]

The summit of Chimborazo in Ecuador is 2,168 m (7,113 ft) farther from the Earth's centre (6,384.4 km (3,967.1 mi)) than that of Everest (6,382.3 km (3,965.8 mi)), because the Earth bulges at the Equator. However, Chimborazo attains a height of only 6,267 m (20,561 ft) above sea level, and by this criterion it is not even the highest peak of the Andes.
[edit] Climbing routes
Southern and northern climbing routes as seen from the International Space Station.

Mt. Everest has two main climbing routes, the southeast ridge from Nepal and the northeast ridge from Tibet, as well as many other less frequently climbed routes.[30] Of the two main routes, the southeast ridge is technically easier and is the more frequently used route. It was the route used by Edmund Hillary and Tenzing Norgay in 1953 and the first recognized of fifteen routes to the top by 1996.[30] This was, however, a route decision dictated more by politics than by design as the Chinese border was closed to the western world in the 1950s after the People's Republic of China invaded Tibet.[31]
View from space showing South Col route and North Col/Ridge route

Most attempts are made during May before the summer monsoon season. As the monsoon season approaches, a change in the jet stream at this time pushes it northward, thereby reducing the average wind speeds high on the mountain.[32][33] While attempts are sometimes made after the monsoons in September and October, when the jet stream is again temporarily pushed northward, the additional snow deposited by the monsoons and the less stable weather patterns (tail end of the monsoon) makes climbing extremely difficult.
[edit] Southeast ridge

The ascent via the southeast ridge begins with a trek to Base Camp at 5,380 m (17,700 ft) on the south side of Everest in Nepal. Expeditions usually fly into Lukla (2,860 m) from Kathmandu and pass through Namche Bazaar. Climbers then hike to Base Camp, which usually takes six to eight days, allowing for proper altitude acclimatization in order to prevent altitude sickness.[34] Climbing equipment and supplies are carried by yaks, dzopkyos (yak hybrids) and human porters to Base Camp on the Khumbu Glacier. When Hillary and Tenzing climbed Everest in 1953, they started from Kathmandu Valley, as there were no roads further east at that time.

Climbers will spend a couple of weeks in Base Camp, acclimatizing to the altitude. During that time, Sherpas and some expedition climbers will set up ropes and ladders in the treacherous Khumbu Icefall. Seracs, crevasses and shifting blocks of ice make the icefall one of the most dangerous sections of the route. Many climbers and Sherpas have been killed in this section. To reduce the hazard, climbers will usually begin their ascent well before dawn when the freezing temperatures glue ice blocks in place. Above the icefall is Camp I at 6,065 metres (19,900 ft).

From Camp I, climbers make their way up the Western Cwm to the base of the Lhotse face, where Camp II or Advanced Base Camp (ABC) is established at 6,500 m (21,300 ft). The Western Cwm is a flat, gently rising glacial valley, marked by huge lateral crevasses in the centre which prevent direct access to the upper reaches of the Cwm. Climbers are forced to cross on the far right near the base of Nuptse to a small passageway known as the "Nuptse corner". The Western Cwm is also called the "Valley of Silence" as the topography of the area generally cuts off wind from the climbing route. The high altitude and a clear, windless day can make the Western Cwm unbearably hot for climbers.[35]

From ABC, climbers ascend the Lhotse face on fixed ropes up to Camp III, located on a small ledge at 7,470 m (24,500 ft). From there, it is another 500 metres to Camp IV on the South Col at 7,920 m (26,000 ft). From Camp III to Camp IV, climbers are faced with two additional challenges: The Geneva Spur and The Yellow Band. The Geneva Spur is an anvil shaped rib of black rock named by the 1952 Swiss expedition. Fixed ropes assist climbers in scrambling over this snow covered rock band. The Yellow Band is a section of interlayered marble, phyllite, and semischist which also requires about 100 metres of rope for traversing it.[35]

On the South Col, climbers enter the death zone. Climbers typically only have a maximum of two or three days they can endure at this altitude for making summit bids. Clear weather and low winds are critical factors in deciding whether to make a summit attempt. If weather does not cooperate within these short few days, climbers are forced to descend, many all the way back down to Base Camp.
verest base camp.jpg
A view of Everest southeast ridge base camp. The Khumbu Icefall can be seen in the left. In the center are the remnants of a helicopter that crashed in 2003.

From Camp IV, climbers will begin their summit push around midnight with hopes of reaching the summit (still another 1,000 metres above) within 10 to 12 hours. Climbers will first reach "The Balcony" at 8,400 m (27,600 ft), a small platform where they can rest and gaze at peaks to the south and east in the early light of dawn. Continuing up the ridge, climbers are then faced with a series of imposing rock steps which usually forces them to the east into waist deep snow, a serious avalanche hazard. At 8,750 m (28,700 ft), a small table-sized dome of ice and snow marks the South Summit.[35]

From the South Summit, climbers follow the knife-edge southeast ridge along what is known as the "Cornice traverse" where snow clings to intermittent rock. This is the most exposed section of the climb as a misstep to the left would send one 2,400 m (8,000 ft) down the southwest face while to the immediate right is the 3,050 m (10,000 ft) Kangshung face. At the end of this traverse is an imposing 12 m (40 ft) rock wall called the "Hillary Step" at 8,760 m (28,740 ft).[35]

Hillary and Tenzing were the first climbers to ascend this step and they did it with primitive ice climbing equipment and with ropes. Nowadays, climbers will ascend this step using fixed ropes previously set up by Sherpas. Once above the step, it is a comparatively easy climb to the top on moderately angled snow slopes–though the exposure on the ridge is extreme especially while traversing large cornices of snow. With increasing numbers of people climbing the mountain in recent years, the Step has frequently become a bottleneck, with climbers forced to wait significant amounts of time for their turn on the ropes, leading to problems in getting climbers efficiently up and down the mountain. After the Hillary Step, climbers also must traverse a loose and rocky section that has a large entanglement of fixed ropes that can be troublesome in bad weather. Climbers will typically spend less than a half-hour on the "top of the world" as they realize the need to descend to Camp IV before darkness sets in, afternoon weather becomes a serious problem, or supplemental oxygen tanks run out.
[edit] Northeast ridge
Mount Everest north face from Rongbuk in Tibet

The northeast ridge route begins from the north side of Everest in Tibet. Expeditions trek to the Rongbuk Glacier, setting up Base Camp at 5,180 m (16,990 ft) on a gravel plain just below the glacier. To reach Camp II, climbers ascend the medial moraine of the east Rongbuk Glacier up to the base of Changtse at around 6,100 m (20,000 ft). Camp III (ABC – Advanced Base Camp) is situated below the North Col at 6,500 m (21,300 ft). To reach Camp IV on the north col, climbers ascend the glacier to the foot of the col where fixed ropes are used to reach the North Col at 7,010 m (23,000 ft). From the North Col, climbers ascend the rocky north ridge to set up Camp V at around 7,775 m (25,500 ft). The route crosses the North Face in a diagonal climb to the base of the Yellow Band reaching the site of Camp VI at 8,230 m (27,000 ft). From Camp VI, climbers will make their final summit push. Climbers face a treacherous traverse from the base of the First Step: 27,890 feet (8,500 m) – 28,000 feet (8,500 m), to the crux of the climb, the Second Step: 28,140 feet (8,580 m) – 28,300 feet. (The Second Step includes a climbing aid called the "Chinese ladder", a metal ladder placed semi-permanently in 1975 by a party of Chinese climbers. It has been almost continuously in place since, and ladders have been used by virtually all climbers on the route.) Once above the Second Step the inconsequential Third Step is clambered over: 28,510 feet (8,690 m) – 28,870 feet (8,800 m). Once above these steps, the summit pyramid is climbed by a snow slope of 50 degrees, to the final summit ridge along which the top is reached.[36]

See also: the Three Steps
[edit] Ascents
Main article: Timeline of climbing Mount Everest
[edit] Early expeditions
Rongbuk Monastery in Tibet with the north side of Everest in the background.

In 1885, Clinton Thomas Dent, president of the Alpine Club, suggested that climbing Mount Everest was possible in his book Above the Snow Line.[37]

The northern approach to the mountain was discovered by George Mallory on the first expedition in 1921. It was an exploratory expedition not equipped for a serious attempt to climb the mountain. With Mallory leading (and thus becoming the first European to set foot on Everest's flanks) they climbed the North Col 7,007 metres (22,989 ft). From there, Mallory espied a route to the top, but the party was unprepared for the great task of climbing any further and descended.

The British returned for a 1922 expedition. George Finch ("The other George") climbed using oxygen for the first time. He ascended at a remarkable speed—950 feet (290 m) per hour, and reached an altitude of 8,320 m (27,300 ft), the first time a human climbed higher than 8,000m. This feat was entirely lost on the British climbing establishment—except for its "unsporting" nature. Mallory and Col. Felix Norton made a second unsuccessful attempt. Mallory was faulted for leading a group down from the North Col which got caught in an avalanche. Mallory was pulled down too, but seven native porters were killed.

The next Expedition was in 1924. The initial attempt by Mallory and Bruce was aborted when weather conditions precluded the establishment of Camp VI. The next attempt was that of Norton and Somervell who climbed without oxygen and in perfect weather, traversing the North Face into the Great Couloir. Norton managed to reach 8,558 metres (28,077 ft), though he ascended only 100 feet (30 m) or so in the last hour. Mallory rustled up oxygen equipment for a last-ditch effort. He chose the young Andrew Irvine as his partner.

On 8 June 1924 George Mallory and Andrew Irvine made an attempt on the summit via the North Col/North Ridge/Northeast Ridge route from which they never returned. On 1 May 1999 the Mallory and Irvine Research Expedition found Mallory's body on the North Face in a snow basin below and to the west of the traditional site of Camp VI. Controversy has raged in the mountaineering community whether one or both of them reached the summit 29 years before the confirmed ascent (and of course, safe descent) of Everest by Sir Edmund Hillary and Tenzing Norgay in 1953.

In 1933, Lady Houston, a British millionaire ex-showgirl, funded the Houston Everest Flight of 1933, which saw a formation of aircraft led by the Marquess of Clydesdale fly over the summit in an effort to deploy the British Union Flag at the top.[38][39][40]

Early expeditions—such as Bruce's in the 1920s and Hugh Ruttledge's two unsuccessful attempts in 1933 and 1936—tried to make an ascent of the mountain from Tibet, via the north face. Access was closed from the north to western expeditions in 1950, after the Chinese asserted control over Tibet. In 1950, Bill Tilman and a small party which included Charles Houston, Oscar Houston and Betsy Cowles undertook an exploratory expedition to Everest through Nepal along the route which has now become the standard approach to Everest from the south.[41]

The Swiss expedition of 1952, led by Edouard Wyss-Dunant, was granted permission to attempt a climb from Nepal. The expedition established a route through the Khumbu ice fall and ascended to the South Col at an elevation of 7,986 metres (26,201 ft). No attempt at an ascent of Everest was ever under consideration in this case.[42] Raymond Lambert and Sherpa Tenzing Norgay were able to reach a height of about 8,595 metres (28,199 ft) on the southeast ridge, setting a new climbing altitude record. Tenzing's experience was useful when he was hired to be part of the British expedition in 1953.[43]
[edit] First successful ascent by Tenzing and Hillary

In 1953, a ninth British expedition, led by John Hunt, returned to Nepal. Hunt selected two climbing pairs to attempt to reach the summit. The first pair (Tom Bourdillon and Charles Evans) came within 100 m (300 feet) of the summit on 26 May 1953, but turned back after becoming exhausted. As planned, their work in route finding and breaking trail and their caches of extra oxygen were of great aid to the following pair. Two days later, the expedition made its second and final assault on the summit with its second climbing pair, the New Zealander Edmund Hillary and Tenzing Norgay, a Nepali sherpa climber. They reached the summit at 11:30 a.m. local time on 29 May 1953 via the South Col Route. At the time, both acknowledged it as a team effort by the whole expedition, but Tenzing revealed a few years later that Hillary had put his foot on the summit first.[44] They paused at the summit to take photographs and buried a few sweets and a small cross in the snow before descending.

News of the expedition's success reached London on the morning of Queen Elizabeth II's coronation, June 2. Returning to Kathmandu a few days later, Hunt (a Briton) and Hillary (a New Zealander) discovered that they had been promptly knighted in the Order of the British Empire, a KBE, for the ascent. Tenzing (a subject of the King of Nepal) was granted the George Medal by the UK. Hunt was ultimately made a life peer in Britain, while Hillary became a founding member of the Order of New Zealand. Hillary and Tenzing are also nationally recognized in Nepal, where annual ceremonies in schools and offices celebrate their accomplishment.[45]
[edit] First ascents without supplemental oxygen and first solo ascent

On 8 May 1978, Reinhold Messner (Italy) and Peter Habeler (Austria) made the first ascent without supplemental oxygen, using the southeast ridge route.[30][46] On 20 August 1980, Messner reached the summit of the mountain solo for the first time, without supplementary oxygen or support, on the more difficult Northwest route via the North Col to the North Face and the Great Couloir. He climbed for three days entirely alone from his base camp at 6,500 metres (21,300 ft).[30]
[edit] First winter ascent

In 1980, a team from Poland led by Andrzej Zawada, Leszek Cichy, and Krzysztof Wielicki became the first to reach the summit during the winter season.
[edit] 1996 disaster
Main article: 1996 Mount Everest disaster

During the 1996 season, 15 people died while climbing on Mount Everest, making it the deadliest single year in the mountain's history. Eight of them died on 11 May alone. The disaster gained wide publicity and raised questions about the commercialization of climbing Mount Everest.

Journalist Jon Krakauer, on assignment from Outside magazine, was in one of the affected parties, and afterwards published the bestseller Into Thin Air, which related his experience. Anatoli Boukreev, a guide who felt impugned by Krakauer's book, co-authored a rebuttal book called The Climb. The dispute sparked a debate within the climbing community. In May 2004, Kent Moore, a physicist, and John L. Semple, a surgeon, both researchers from the University of Toronto, told New Scientist magazine that an analysis of weather conditions on 11 May suggested that freak weather caused oxygen levels to plunge approximately 14%.[47][48]

The storm's impact on climbers on the North Ridge of Mount Everest, where several climbers also died, was detailed in a first-hand account by British filmmaker and writer Matt Dickinson in his book The Other Side of Everest. 16-year-old Mark Pfetzer was on the climb and wrote about it in his account, Within Reach: My Everest Story.
[edit] 2005: Helicopter landing

On 14 May 2005, pilot Didier Delsalle of France landed a Eurocopter AS 350 B3 helicopter on the summit of Mount Everest[49] (without any witness) and took off after about four minutes. (His rotors were continually engaged, constituting a "hover landing", and avoiding the risks of relying on the snow to support the aircraft.) He thereby set rotorcraft world records, for highest of both landing (de facto) and take-off (formally).[50]

Delsalle had also performed, two days earlier, a take-off from the South Col; some press reports suggested that the report of the summit landing was a misunderstanding of a South Col landing.[51]
[edit] 2006: David Sharp controversy

Double-amputee climber Mark Inglis revealed in an interview with the press on 23 May 2006,[52] that his climbing party, and many others, had passed a distressed climber, David Sharp, on 15 May, sheltering under a rock overhang 450 metres (1,480 ft) below the summit, without attempting a rescue. The revelation sparked wide debate on climbing ethics, especially as applied to Everest. The climbers who left him said that the rescue efforts would have been useless and only have caused more deaths. Much of this controversy was captured by the Discovery Channel while filming the television program Everest: Beyond the Limit. A crucial decision affecting the fate of Sharp is shown in the program, where an early returning climber (Max Chaya) is descending and radios to his base camp manager (Russell Brice) that he has found a climber in distress. He is unable to identify Sharp, who had chosen to climb solo without any support and so did not identify himself to other climbers. The base camp manager assumes that Sharp is part of a group that has abandoned him, and informs his climber that there is no chance of him being able to help Sharp. As Sharp's condition deteriorates through the day and other descending climbers pass him, his opportunities for rescue diminish: his legs and feet curl from frostbite, preventing him from walking; the later descending climbers are lower on oxygen and lack the strength to offer aid; time runs out for any Sherpas to return and rescue him. Most importantly, Sharp's decision to forgo all support left him with no margin for recovery.

As this debate raged, on 26 May, Australian climber Lincoln Hall was found alive, after being declared dead the day before. He was found by a party of four climbers (Dan Mazur, Andrew Brash, Myles Osborne and Jangbu Sherpa) who, giving up their own summit attempt, stayed with Hall and descended with him and a party of 11 Sherpas sent up to carry him down. Hall later fully recovered. Similar actions have been recorded since, including on 21 May 2007, when Canadian climber Meagan McGrath initiated the successful high-altitude rescue of Nepali Usha Bista.
[edit] Various records

The youngest person to climb Mount Everest was 13-year-old Jordan Romero in May 2010.[53] Apa Sherpa holds the record for reaching the summit more times than any other person (20 times as of May 2010[update]).

The fastest ascent over the northeast ridge was accomplished in 2007 by Austrian climber Christian Stangl, who needed 16h 42min for the 10 km distance from Camp III to the summit, just barely beating Italian Hans Kammerlander's record of 17 hours, accomplished in 1996. Both men climbed alone and without supplementary oxygen. The fastest oxygen-supported ascent over the southeast ridge was Nepalese Pemba Dorjie Sherpa's 2004 climb, using 8h 10min for the 17 km route. The fastest ascent without supplementary oxygen over the southeast ridge was accomplished by French Marc Batard who reached the summit in 22h 30min in 1988.[54]

The first descent by paraglider was by Jean-Marc Boivin on 26 September 1988,[55] and the first descent by ski was in 2000 by Davo Karnicar.[56]

The oldest climber to reach Mt. Everest's summit is 76-year-old Min Bahadur Sherchan, who did so 25 May 2008 from the Nepal side. Sherchan beat the previous record set in 2007 by 71 year old Katsusuke Yanagisawa.[57] The oldest climber to summit Mt. Everest from both sides (Nepal and Tibet) of the mountain is 60-year-old Julio Bird, a Puerto Rican cardiologist who reached the summit of Mt. Everest from the north side on May 17, 2010.[58]
[edit] Death zone
Main article: Death zone

At the higher regions of Mount Everest, climbers seeking the summit typically spend substantial time within the "death zone" (altitudes higher than 8,000 m/26,246 ft), and face significant challenges to survival. Temperatures can dip to very low levels, resulting in frostbite of any body part exposed to the air. Since temperatures are so low, snow is well-frozen in certain areas and death or injury by slipping and falling can occur. High winds at these altitudes on Everest are also a potential threat to climbers.

Another significant threat to climbers is low atmospheric pressure. The atmospheric pressure at the top of Everest is about a third of sea level pressure, resulting in the availability of only about a third as much oxygen to breathe.[59]

In May 2007, the Caudwell Xtreme Everest undertook a medical study of oxygen levels in human blood at extreme altitude. Over 200 volunteers climbed to Everest Base Camp where various medical tests were performed to examine blood oxygen levels. A small team also performed tests on the way to the summit.[60]

Even at base camp, the low level of oxygen had direct effect on blood oxygen saturation levels. At sea level, blood oxygen saturation is generally 98% to 99%. At base camp, blood saturation fell to between 85% and 87%. Blood samples taken at the summit indicated very low oxygen levels in the blood. A side effect of low blood oxygen is a vastly increased breathing rate, often 80–90 breaths per minute as opposed to a more typical 20–30. Exhaustion can occur merely attempting to breathe.[61]

Lack of oxygen, exhaustion, extreme cold, and climbing hazards all contribute to the death toll. An injured person who cannot walk is in serious trouble, since rescue by helicopter is generally impractical and carrying the person off the mountain is very risky. People who die during the climb are typically left behind. About 150 bodies have never been recovered. It is not uncommon to find corpses near the standard climbing routes.[62]
[edit] Using bottled oxygen
Northern panoramic view of Everest from Tibetan Plateau

Most expeditions use oxygen masks and tanks above 8,000 m (26,246 ft).[63] Everest can be climbed without supplementary oxygen, but at increased risk to the climber. Humans do not think clearly with low oxygen, and the combination of extreme weather, low temperatures, and steep slopes often require quick, accurate decisions.

The use of bottled oxygen to ascend Mount Everest has been controversial. It was first used in 1922 by George Finch ("the other George") and Geoffrey Bruce who climbed up to 25,500 ft (7,800 m) at a spectacular speed of 1000 vertical feet per hour. Pinned down by a fierce storm, they escaped death by breathing oxygen from a jury-rigged set-up during the night. The next day they climbed to 26,500 ft (8,100 m) at 900 vf/h--nearly three times as fast as non-oxygen users. Yet the use of oxygen was considered so unsportsmanlike that none of the rest of the Alpine world recognized this high ascent rate, confusing the facts with emotional considerations. George Mallory himself described the use of such oxygen as unsportsmanlike, but he later concluded that it would be impossible for him to summit without it and consequently used it in his ill-fated attempt in 1924.[64] When Tenzing and Hillary made the first successful summit in 1953, they used bottled oxygen. For the next twenty-five years, bottled oxygen was considered standard for any successful summit.

Reinhold Messner was the first climber to break the bottled oxygen tradition and in 1978, with Peter Habeler, made the first successful climb without it. Although critics alleged that he sucked mini-bottles of oxygen – a claim that Messner denied – Messner silenced them when he summited the mountain solo, without supplemental oxygen or any porters or climbing partners, on the more difficult northwest route, in 1980. Once the climbing community was satisfied that the mountain could be climbed without supplemental oxygen, many purists then took the next logical step of insisting that's how it should be climbed.[65]

The aftermath of the 1996 disaster further intensified the debate. Jon Krakauer's Into Thin Air (1997) expressed the author's personal criticisms of the use of bottled oxygen. Krakauer wrote that the use of bottled oxygen allowed otherwise unqualified climbers to attempt to summit, leading to dangerous situations and more deaths. The 10-11 May 1996 disaster was partially caused by the sheer number of climbers (34 on that day) attempting to ascend, causing bottlenecks at the Hillary Step and delaying many climbers, most of whom summitted after the usual 2 p.m. turnaround time. He proposed banning bottled oxygen except for emergency cases, arguing that this would both decrease the growing pollution on Everest—many bottles have accumulated on its slopes—and keep marginally qualified climbers off the mountain.

The 1996 disaster also introduced the issue of the guide's role in using bottled oxygen.[66] Guide Anatoli Boukreev's decision not to use bottled oxygen was sharply criticized by Jon Krakauer. Boukreev's supporters (who include G. Weston DeWalt, who co-wrote The Climb) state that using bottled oxygen gives a false sense of security.[67] Krakauer and his supporters point out that, without bottled oxygen, Boukreev could not directly help his clients descend.[68] They state that Boukreev said that he was going down with client Martin Adams,[68] but just below the South Summit, Boukreev determines that Adams was doing fine on the descent and so descends at a faster pace, leaving Adams behind. Adams states in The Climb: "For me, it was business as usual, Anatoli's going by, and I had no problems with that."[69]
2004 photo mosaic the Himalayas with Makalu and Mount Everest from the International Space Station, Expedition 8.
[edit] Thefts and other crimes

Some climbers have reported life-threatening thefts from supply caches. Vitor Negrete, the first Brazilian to climb Everest without oxygen and part of David Sharp's party, died during his descent, and theft from his high-altitude camp may have contributed.[70]

In addition to theft, the 2008 book High Crimes by Michael Kodas describes unethical guides and Sherpas, prostitution and gambling at the Tibet Base Camp, fraud related to the sale of oxygen bottles, and climbers collecting donations under the pretense of removing trash from the mountain.[71][72]
[edit] Flora and fauna

Euophrys omnisuperstes, a minute black jumping spider, has been found at elevations as high as 6,700 metres (22,000 ft), possibly making it the highest confirmed non-microscopic permanent resident on Earth. It lurks in crevices and may feed on frozen insects that have been blown there by the wind. It should be noted that there is a high likelihood of microscopic life at even higher altitudes.[73] Birds, such as the Bar-headed Goose, have been seen flying at the higher altitudes of the mountain, while others, such as the Chough, have been spotted as high as the South Col (7,920 m)[74] scavenging on food, or even corpses, left by prior climbing expeditions.
[edit] Geology
The last rays of sunlight on Mount Everest on 5 May 2007

Geologists have subdivided the rocks comprising Mount Everest into three units called "formations".[75][76] Each formation is separated from the other by low-angle faults, called “detachments”, along which they have been thrust over each other. From the summit of Mount Everest to its base these rock units are the Qomolangma Formation, the North Col Formation, and the Rongbuk Formation.

From its summit to the top of the Yellow Band, about 8,600 m (28,000 ft) above sea level, the top of Mount Everest consists of the Qomolangma Formation, which has also been designated as either the Everest Formation or Jolmo Lungama Formation. It consists of grayish to dark gray or white, parallel laminated and bedded, Ordovician limestone interlayered with subordinate beds of recrystallized dolomite with argillaceous laminae and siltstone. Gansser first reported finding microscopic fragments of crinoids in these limestones.[77] Later petrographic analysis of samples of the limestones from near the summit revealed them to be composed of carbonate pellets and finely fragmented remains of trilobites, crinoids, and ostracods. Other samples were so badly sheared and recrystallized that their original constituents could not be determined. A thick, white-weathering thrombolite bed that is 60 m (200 ft) thick comprises the foot of the "Third Step," and base of the summit pyramid of Everest. This bed, which crops out starting about 70 m (300 ft) below the summit of Mount Everest, consists of sediments trapped, bound, and cemented by the biofilms of microorganisms, especially cyanobacteria, in shallow marine waters. The Qomolangma Formation is broken up by several high-angle faults that terminate at the low angle thrust fault, the Qomolangma Detachment. This detachment separates it from the underlying Yellow Band. The lower five metres of the Qomolangma Formation overlying this detachment are very highly deformed.[75][76][78]

The bulk of Mount Everest, between 7,000 and 8,600 m (23,000 and 28,200 ft), consists of the North Col Formation, of which the Yellow Band forms its upper part between 8,200 to 8,600 m (26,900 to 28,200 ft). The Yellow Band consists of intercalated beds of Middle Cambrian diopside-epidote-bearing marble, which weathers a distinctive yellowish brown, and muscovite-biotite phyllite and semischist. Petrographic analysis of marble collected from about 8,300 m (27,200 ft) found it to consist as much as five percent of the ghosts of recrystallized crinoid ossicles. The upper five metres of the Yellow Band lying adjacent to the Qomolangma Detachment is badly deformed. A 5–40 cm (2–16 in) thick fault breccia separates it from the overlying Qomolangma Formation.[75][76][78]

The remainder of the North Col Formation, exposed between 7,000 to 8,200 m (23,000 to 26,900 ft) on Mount Everest, consists of interlayered and deformed schist, phyllite, and minor marble. Between 7,600 and 8,200 m (24,900 and 26,900 ft), the North Col Formation consists chiefly of biotite-quartz phyllite and chlorite-biotite phyllite intercalated with minor amounts of biotite-sericite-quartz schist. Between 7,000 and 7,600 m (23,000 and 24,900 ft), the lower part of the North Col Formation consists of biotite-quartz schist intercalated with epidote-quartz schist, biotite-calcite-quartz schist, and thin layers of quartzose marble. These metamorphic rocks appear to be the result of the metamorphism of Middle to Early Cambrian deep sea flysch composed of interbedded, mudstone, shale, clayey sandstone, calcareous sandstone, graywacke, and sandy limestone. The base of the North Col Formation is a regional thrust fault called the "Lhotse detachment".[75][76][78]

Below 7,000 m (23,000 ft), the Rongbuk Formation underlies the North Col Formation and forms the base of Mount Everest. It consists of sillminite-K-feldspar grade schist and gneiss intruded by numerous sills and dikes of leucogranite ranging in thickness from 1 cm to 1,500 m (0.4 in to 4,900 ft).[76][79]
Angkor Wat
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Angkor Wat
Angkor Wat is located in Cambodia
Angkor Wat
Location in Cambodia
Coordinates: 13°24′45″N 103°52′0″E / 13.4125°N 103.866667°E / 13.4125; 103.866667Coordinates: 13°24′45″N 103°52′0″E / 13.4125°N 103.866667°E / 13.4125; 103.866667
Name
Proper name: Prasat Angkor Wat
Location
Country: Cambodia
Location: Angkor
Architecture and culture
Primary deity: Vishnu
Architectural styles: Khmer, Dravidian
History
Date built: 12th century
Creator: Suryavarman II

Angkor Wat (Khmer: អង្គរវត្ត) is a temple complex at Angkor, Cambodia, built for the king Suryavarman II in the early 12th century as his state temple and capital city. As the best-preserved temple at the site, it is the only one to have remained a significant religious centre since its foundation – first Hindu, dedicated to the god Vishnu, then Buddhist. It is the world's largest religious building.[1] The temple is at the top of the high classical style of Khmer architecture. It has become a symbol of Cambodia, appearing on its national flag, and it is the country's prime attraction for visitors. Angkor Wat combines two basic plans of Khmer temple architecture: the temple mountain and the later galleried temple, based on early South Indian Hindu architecture, with key features such as the Jagati. It is designed to represent Mount Meru, home of the devas in Hindu mythology: within a moat and an outer wall 3.6 kilometres (2.2 mi) long are three rectangular galleries, each raised above the next. At the centre of the temple stands a quincunx of towers. Unlike most Angkorian temples, Angkor Wat is oriented to the west; scholars are divided as to the significance of this. The temple is admired for the grandeur and harmony of the architecture, its extensive bas-reliefs and for the numerous devatas (guardian spirits) adorning its walls.

The modern name, Angkor Wat, means "City Temple"; Angkor is a vernacular form of the word នគរ nokor which comes from the Sanskrit word नगर nagara meaning capital or city. Wat is the Khmer word for temple. Prior to this time the temple was known as Preah Pisnulok, after the posthumous title of its founder, Suryavarman II.[2]


This article contains Khmer text. Without proper rendering support, you may see question marks, boxes, or other symbols instead of Khmer script.
This article contains Indic text. Without proper rendering support, you may see question marks or boxes, misplaced vowels or missing conjuncts instead of Indic text.
Contents
[hide]

* 1 History
* 2 Architecture
o 2.1 Site and plan
o 2.2 Style
o 2.3 Features
+ 2.3.1 Outer enclosure
+ 2.3.2 Central structure
+ 2.3.3 Decoration
o 2.4 Construction techniques
* 3 Angkor Wat today
* 4 Notes
* 5 References
* 6 External links

[edit] History
King Suryavarman II, the builder of Angkor Wat
Henri Mouhot popularised the temple in the west in the mid 19th-century

Angkor Wat lies 5.5 km north of the modern town of Siem Reap, and a short distance south and slightly east of the previous capital, which was centred at Baphuon. It is in an area of Cambodia where there is an important group of ancient structures. It is the southernmost of Angkor's main sites.

The initial design and construction of the temple took place in the first half of the 12th century, during the reign of Suryavarman II (ruled 1113 – c. 1150). Dedicated to Vishnu, it was built as the king's state temple and capital city. As neither the foundation stela nor any contemporary inscriptions referring to the temple have been found, its original name is unknown, but it may have been known as Vrah Vishnulok after the presiding deity. Work seems to have ended shortly after the king's death, leaving some of the bas-relief decoration unfinished.[3] In 1177, approximately 27 years after the death of Suryavarman II, Angkor was sacked by the Chams, the traditional enemies of the Khmer. Thereafter the empire was restored by a new king, Jayavarman VII, who established a new capital and state temple (Angkor Thom and the Bayon respectively) a few kilometres to the north.

In the late 13th century, Angkor Wat gradually moved from Hindu to Theravada Buddhist use, which continues to the present day. Angkor Wat is unusual among the Angkor temples in that although it was somewhat neglected after the 16th century it was never completely abandoned, its preservation being due in part to the fact that its moat also provided some protection from encroachment by the jungle.[4]

One of the first Western visitors to the temple was Antonio da Magdalena, a Portuguese monk who visited in 1586 and said that it "is of such extraordinary construction that it is not possible to describe it with a pen, particularly since it is like no other building in the world. It has towers and decoration and all the refinements which the human genius can conceive of".[5] However, the temple was popularised in the West only in the mid-19th century on the publication of Henri Mouhot's travel notes. The French explorer wrote of it:
Facade of Angkor Wat, a drawing by Henri Mouhot

"One of these temples—a rival to that of Solomon, and erected by some ancient Michelangelo—might take an honourable place beside our most beautiful buildings. It is grander than anything left to us by Greece or Rome, and presents a sad contrast to the state of barbarism in which the nation is now plunged."[6]

Mouhot, like other early Western visitors, found it difficult to believe that the Khmers could have built the temple, and mistakenly dated it to around the same era as Rome. The true history of Angkor Wat was pieced together only from stylistic and epigraphic evidence accumulated during the subsequent clearing and restoration work carried out across the whole Angkor site.

There were no ordinary dwellings or houses or other signs of settlement including cooking utensils, weapons, or items of clothing usually found at ancient sites. Instead there is the evidence of the monuments themselves.[7]
French postcard about Angkor Wat in 1911

Angkor Wat required considerable restoration in the 20th century, mainly the removal of accumulated earth and vegetation.[8] Work was interrupted by the civil war and Khmer Rouge control of the country during the 1970s and 1980s, but relatively little damage was done during this period other than the theft and destruction of mostly post-Angkorian statues.[9]

The temple is a powerful symbol of Cambodia, and is a source of great national pride that has factored into Cambodia's diplomatic relations with its neighbour Thailand, France and the United States. A depiction of Angkor Wat has been a part of Cambodian national flags since the introduction of the first version circa 1863.[10]

The splendid artistic legacy of Angkor Wat and other Khmer monuments in the Angkor region led directly to France adopting Cambodia as a protectorate on 11 August 1863. This quickly led to Cambodia reclaiming lands in the northwestern corner of the country that had been under Thai control since the Thai invasion of 1431 AD.[11] Cambodia gained independence from France on 9 November 1953 and has controlled Angkor Wat since that time.

During the midst of the Vietnam War, Chief of State Norodom Sihanouk hosted Jacqueline Kennedy in Cambodia to fulfill her "lifelong dream of seeing Angkor Wat."[12]

In January 2003 riots erupted in Phnom Penh when a false rumour circulated that a Thai soap opera actress had claimed that Angkor Wat belonged to Thailand.[13]
[edit] Architecture
[edit] Site and plan
General plan of Angkor Wat with central structure in the middle
Detailed plan of the central structure

Angkor Wat, located at 13°24′45″N 103°52′0″E / 13.4125°N 103.866667°E / 13.4125; 103.866667, is a unique combination of the temple mountain, the standard design for the empire's state temples, the later plan of concentric galleries, and influences from Orissa and the Chola of Tamil Nadu, India. The temple is a representation of Mount Meru, the home of the gods: the central quincunx of towers symbolises the five peaks of the mountain, and the walls and moat the surrounding mountain ranges and ocean.[14] Access to the upper areas of the temple was progressively more exclusive, with the laity being admitted only to the lowest level.[15]

Unlike most Khmer temples, Angkor Wat is oriented to the west rather than the east. This has led many (including Glaize and George Coedès) to conclude that Suryavarman intended it to serve as his funerary temple.[16] Further evidence for this view is provided by the bas-reliefs, which proceed in a counter-clockwise direction—prasavya in Hindu terminology—as this is the reverse of the normal order. Rituals take place in reverse order during Brahminic funeral services.[8] The archaeologist Charles Higham also describes a container which may have been a funerary jar which was recovered from the central tower.[17] It has been nominated by some as the greatest expenditure of energy on the disposal of a corpse.[18] Freeman and Jacques, however, note that several other temples of Angkor depart from the typical eastern orientation, and suggest that Angkor Wat's alignment was due to its dedication to Vishnu, who was associated with the west.[14]

A further interpretation of Angkor Wat has been proposed by Eleanor Mannikka. Drawing on the temple's alignment and dimensions, and on the content and arrangement of the bas-reliefs, she argues that the structure represents a claimed new era of peace under King Suryavarman II: "as the measurements of solar and lunar time cycles were built into the sacred space of Angkor Wat, this divine mandate to rule was anchored to consecrated chambers and corridors meant to perpetuate the king's power and to honor and placate the deities manifest in the heavens above."[19][20] Mannikka's suggestions have been received with a mixture of interest and scepticism in academic circles.[17] She distances herself from the speculations of others, such as Graham Hancock, that Angkor Wat is part of a representation of the constellation Draco.[21]
[edit] Style
Upper gallery at Angkor Wat

Angkor Wat is the prime example of the classical style of Khmer architecture—the Angkor Wat style—to which it has given its name. By the 12th century Khmer architects had become skilled and confident in the use of sandstone (rather than brick or laterite) as the main building material. Most of the visible areas are of sandstone blocks, while laterite was used for the outer wall and for hidden structural parts. The binding agent used to join the blocks is yet to be identified, although natural resins or slaked lime have been suggested.[22]

Angkor Wat has drawn praise above all for the harmony of its design, which has been compared to the architecture of ancient Greece and Rome. According to Maurice Glaize, a mid-20th-century conservator of Angkor, the temple "attains a classic perfection by the restrained monumentality of its finely balanced elements and the precise arrangement of its proportions. It is a work of power, unity and style."[23]

Architecturally, the elements characteristic of the style include: the ogival, redented towers shaped like lotus buds; half-galleries to broaden passageways; axial galleries connecting enclosures; and the cruciform terraces which appear along the main axis of the temple. Typical decorative elements are devatas (or apsaras), bas-reliefs, and on pediments extensive garlands and narrative scenes. The statuary of Angkor Wat is considered conservative, being more static and less graceful than earlier work.[24] Other elements of the design have been destroyed by looting and the passage of time, including gilded stucco on the towers, gilding on some figures on the bas-reliefs, and wooden ceiling panels and doors.[25]

The Angkor Wat style was followed by that of the Bayon period, in which quality was often sacrificed to quantity.[26] Other temples in the style are Banteay Samré, Thommanon, Chao Say Tevoda and the early temples of Preah Pithu at Angkor; outside Angkor, Beng Mealea and parts of Phanom Rung and Phimai.
[edit] Features
Aerial view of Angkor Wat
[edit] Outer enclosure
The Temple viewed from the northwest

The outer wall, 1024 by 802 m and 4.5 m high, is surrounded by a 30 m apron of open ground and a moat 190 m wide. Access to the temple is by an earth bank to the east and a sandstone causeway to the west; the latter, the main entrance, is a later addition, possibly replacing a wooden bridge.[27] There are gopuras at each of the cardinal points; the western is by far the largest and has three ruined towers. Glaize notes that this gopura both hides and echoes the form of the temple proper.[28] Under the southern tower is a statue of Vishnu, known as Ta Reach, which may originally have occupied the temple's central shrine.[27] Galleries run between the towers and as far as two further entrances on either side of the gopura often referred to as "elephant gates", as they are large enough to admit those animals. These galleries have square pillars on the outer (west) side and a closed wall on the inner (east) side. The ceiling between the pillars is decorated with lotus rosettes; the west face of the wall with dancing figures; and the east face of the wall with balustered windows, dancing male figures on prancing animals, and devatas, including (south of the entrance) the only one in the temple to be showing her teeth.

The outer wall encloses a space of 820,000 square metres (203 acres), which besides the temple proper was originally occupied by the city and, to the north of the temple, the royal palace. Like all secular buildings of Angkor, these were built of perishable materials rather than of stone, so nothing remains of them except the outlines of some of the streets.[29] Most of the area is now covered by forest. A 350 m causeway connects the western gopura to the temple proper, with naga balustrades and six sets of steps leading down to the city on either side. Each side also features a library with entrances at each cardinal point, in front of the third set of stairs from the entrance, and a pond between the library and the temple itself. The ponds are later additions to the design, as is the cruciform terrace guarded by lions connecting the causeway to the central structure.[29]
[edit] Central structure
Miniature model of the central structure of Angkor Wat. In the foreground the cruciform terrace which lies in front of the central structure.

The temple stands on a terrace raised higher than the city. It is made of three rectangular galleries rising to a central tower, each level higher than the last. Mannikka interprets these galleries as being dedicated to the king, Brahma, the moon, and Vishnu.[3] Each gallery has a gopura at each of the points, and the two inner galleries each have towers at their corners, forming a quincunx with the central tower. Because the temple faces west, the features are all set back towards the east, leaving more space to be filled in each enclosure and gallery on the west side; for the same reason the west-facing steps are shallower than those on the other sides.

The outer gallery measures 187 by 215 m, with pavilions rather than towers at the corners. The gallery is open to the outside of the temple, with columned half-galleries extending and buttressing the structure. Connecting the outer gallery to the second enclosure on the west side is a cruciform cloister called Preah Poan (the "Hall of a Thousand Buddhas"). Buddha images were left in the cloister by pilgrims over the centuries, although most have now been removed. This area has many inscriptions relating the good deeds of pilgrims, most written in Khmer but others in Burmese and Japanese. The four small courtyards marked out by the cloister may originally have been filled with water.[30] North and south of the cloister are libraries.

Beyond, the second and inner galleries are connected to each other and to two flanking libraries by another cruciform terrace, again a later addition. From the second level upwards, devatas abound on the walls, singly or in groups of up to four. The second-level enclosure is 100 by 115 m, and may originally have been flooded to represent the ocean around Mount Meru.[31] Three sets of steps on each side lead up to the corner towers and gopuras of the inner gallery. The very steep stairways represent the difficulty of ascending to the kingdom of the gods.[32] This inner gallery, called the Bakan, is a 60 m square with axial galleries connecting each gopura with the central shrine, and subsidiary shrines located below the corner towers. The roofings of the galleries are decorated with the motif of the body of a snake ending in the heads of lions or garudas. Carved lintels and pediments decorate the entrances to the galleries and to the shrines. The tower above the central shrine rises 43 m to a height of 65 m above the ground; unlike those of previous temple mountains, the central tower is raised above the surrounding four.[33] The shrine itself, originally occupied by a statue of Vishnu and open on each side, was walled in when the temple was converted to Theravada Buddhism, the new walls featuring standing Buddhas. In 1934, the conservator George Trouvé excavated the pit beneath the central shrine: filled with sand and water it had already been robbed of its treasure, but he did find a sacred foundation deposit of gold leaf two metres above ground level.[34]
[edit] Decoration
Devatas are characteristic of the Angkor Wat style.
The bas-relief of the Churning of the Sea of Milk shows Vishnu in the centre, his turtle Avatar Kurma below, asuras and devas to left and right, and apsaras and Indra above.

Integrated with the architecture of the building, and one of the causes for its fame is Angkor Wat's extensive decoration, which predominantly takes the form of bas-relief friezes. The inner walls of the outer gallery bear a series of large-scale scenes mainly depicting episodes from the Hindu epics the Ramayana and the Mahabharata. Higham has called these, "the greatest known linear arrangement of stone carving".[35] From the north-west corner anti-clockwise, the western gallery shows the Battle of Lanka (from the Ramayana, in which Rama defeats Ravana) and the Battle of Kurukshetra (from the Mahabharata, showing the mutual annihilation of the Kaurava and Pandava clans). On the southern gallery follow the only historical scene, a procession of Suryavarman II, then the 32 hells and 37 heavens of Hindu mythology.

On the eastern gallery is one of the most celebrated scenes, the Churning of the Sea of Milk, showing 92[36] asuras and 88 devas using the serpent Vasuki to churn the sea under Vishnu's direction (Mannikka counts only 91 asuras, and explains the asymmetrical numbers as representing the number of days from the winter solstice to the spring equinox, and from the equinox to the summer solstice).[37] It is followed by Vishnu defeating asuras (a 16th-century addition). The northern gallery shows Krishna's victory over Bana (where according to Glaize, "The workmanship is at its worst"[38]) and a battle between the Hindu gods and asuras. The north-west and south-west corner pavilions both feature much smaller-scale scenes, some unidentified but most from the Ramayana or the life of Krishna.
[edit] Construction techniques

The stones, as smooth as polished marble, were laid without mortar with very tight joints that were sometimes hard to find. The blocks were held together by mortise and tenon joints in some cases, while in others they used dovetails and gravity. The blocks were presumably put in place by a combination of elephants, coir ropes, pulleys and bamboo scaffolding. Henri Mouhot noted that most of the blocks had holes 2.5 cm in diameter and 3 cm deep, with more holes on the larger blocks. Some scholars have suggested that these were used to join them together with iron rods, but others claim they were used to hold temporary pegs to help manoeuvre them into place. The Khmer architects never made the curved arches used by the Romans. They did create a corbelled arch, but this often proved unstable and collapsed.

The monument was made out of enormous amounts of sandstone, as much as Khafre's pyramid in Egypt (over 5 million tons). This sandstone had to be transported from Mount Kulen, a quarry approximately 25 miles (40 km) to the northeast. The stone was presumably transported by raft along the Siem Reap river. This would have to have been done with care to avoid overturning the rafts with such a large amount of weight. One modern engineer estimated it would take 300 years to complete Angkor Wat today.[39] Yet the monument was begun soon after Suryavarman came to the throne and was finished shortly after his death, no more than 40 years.

Virtually all of its surfaces, columns, lintels even roofs are carved. There are miles of reliefs illustrating scenes from Indian literature including unicorns, griffins, winged dragons pulling chariots as well as warriors following an elephant mounted leader and celestial dancing girls with elaborate hair styles. The gallery wall alone is decorated with almost 1,000 square metres of bas reliefs. Holes on some of the Angkor walls indicate that they may have been decorated with bronze sheets. These were highly prized in ancient times and were a prime target for robbers. While excavating Khajuraho, Alex Evans, a stone mason and sculptor, recreated a stone sculpture under 4 feet (1.2 m), this took about 60 days to carve.[40] Roger Hopkins and Mark Lehner also conducted experiments to quarry limestone which took 12 quarrymen 22 days to quarry about 400 tons of stone.[41] The labour force to quarry, transport, carve and install this much sandstone must have run into the thousands including many highly skilled artisans. The skill required to carve these sculptures was developed hundreds of years earlier, as demonstrated by some artifacts found that were dated to the seventh century before the Khmer came into power.[18][39]...
View of the moat surrounding Angkor Wat
[edit] Angkor Wat today
WMF Angkor Wat.ogv
Play video
World Monuments Fund video on conservation of Angkor Wat

The Archaeological Survey of India carried out restoration work on the temple between 1986 and 1992.[42] Since the 1990s, Angkor Wat has seen continued conservation efforts and a massive increase in tourism. The temple is part of the Angkor World Heritage Site, established in 1992, which has provided some funding and has encouraged the Cambodian government to protect the site.[43] The German Apsara Conservation Project (GACP) is working to protect the devatas and other bas-reliefs which decorate the temple from damage. The organisation's survey found that around 20% of the devatas were in very poor condition, mainly because of natural erosion and deterioration of the stone but in part also due to earlier restoration efforts.[44] Other work involves the repair of collapsed sections of the structure, and prevention of further collapse: the west facade of the upper level, for example, has been buttressed by scaffolding since 2002,[45] while a Japanese team completed restoration of the north library of the outer enclosure in 2005.[46] World Monuments Fund began work on the Churning of the Sea of Milk Gallery in 2008.

Angkor Wat has become a major tourist destination. In 2004 and 2005, government figures suggest that, respectively, 561,000 and 677,000 foreign visitors arrived in Siem Reap province, approximately 50% of all foreign tourists in Cambodia for both years.[47] The site has been managed by the private SOKIMEX group since 1990, which rented it from the Cambodian government. The influx of tourists has so far caused relatively little damage, other than some graffiti; ropes and wooden steps have been introduced to protect the bas-reliefs and floors, respectively. Tourism has also provided some additional funds for maintenance—as of 2000 approximately 28% of ticket revenues across the whole Angkor site was spent on the temples—although most work is carried out by foreign government-sponsored teams rather than by the Cambodian authorities.[48]
Hagia Sophia
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Hagia Sophia
Ἁγία Σοφία
Hagia Sophia
A view on the Ayasofya, İstanbul.
Location Istanbul (historically Constantinople) Turkey
Designer Isidore of Miletus
Anthemius of Tralles
Type Currently a Museum, formerly an Imperial Mosque (1453-1931) and Roman Catholic Cathedral (1204-1261); originally constructed as an Eastern Orthodox Cathedral (562-1204, 1261-1453).
Material Ashlar, brick
Length 82 m (269 ft)
Width 73 m (240 ft)
Height 55 m (180 ft)
Beginning date 532
Completion date 537
Interior view of the Hagia Sophia, showing Islamic elements in the ceiling.
Interior view of the Hagia Sophia

Hagia Sophia (from the Greek: Ἁγία Σοφία, "Holy Wisdom"; Latin: Sancta Sophia or Sancta Sapientia; Turkish: Aya Sofya) is a former Orthodox patriarchal basilica, later a mosque, and now a museum in Istanbul, Turkey. From the date of its dedication in 360 until 1453, it served as the cathedral of Constantinople, except between 1204 and 1261, when it was converted to a Roman Catholic cathedral under the Latin Patriarch of Constantinople of the Western Crusader established Latin Empire. The building was a mosque from 29 May 1453 until 1931, when it was secularized. It was opened as a museum on 1 February 1935.[1]

The Church was dedicated to the Logos, the second person of the Holy Trinity,[2] its dedication feast taking place on December 25, the anniversary of the incarnation of the Logos in Christ.[2] Although it is sometimes referred to as Sancta Sophia (as though it were named after Saint Sophia), sophia is the phonetic spelling in Latin of the Greek word for wisdom - the full name in Greek being Ναός τῆς Ἁγίας τοῦ Θεοῦ Σοφίας, "Church of the Holy Wisdom of God".[3][4]

Famous in particular for its massive dome, it is considered the epitome of Byzantine architecture and is said to have "changed the history of architecture."[5] It was the largest cathedral in the world for nearly a thousand years, until Seville Cathedral was completed in 1520. The current building was originally constructed as a church between 532 and 537 on the orders of the Byzantine Emperor Justinian and was the third Church of the Holy Wisdom to occupy the site, the previous two having both been destroyed by rioters. It was designed by the Greek scientists Isidore of Miletus, a physicist, and Anthemius of Tralles, a mathematician.[6]

The church contained a large collection of holy relics and featured, among other things, a 49 foot (15 m) silver iconostasis. It was the seat of the Patriarch of Constantinople and the religious focal point of the Eastern Orthodox Church for nearly one thousand years. It is the church in which Cardinal Humbert in 1054 excommunicated Michael I Cerularius - which is commonly considered the start of the Great Schism.

In 1453, Constantinople was conquered by the Ottoman Turks under Sultan Mehmed II, who subsequently ordered the building converted into a mosque.[7] The bells, altar, iconostasis, and sacrificial vessels were removed and many of the mosaics were plastered over. Islamic features — such as the mihrab, minbar, and four minarets — were added while in the possession of the Ottomans. It remained a mosque until 1931 when it was closed to the public for four years. It was re-opened in 1935 as a museum by the Republic of Turkey.

For almost 500 years the principal mosque of Istanbul, Hagia Sophia served as a model for many other Ottoman mosques, such as the Sultan Ahmed Mosque (Blue Mosque of Istanbul), the Şehzade Mosque, the Süleymaniye Mosque, the Rüstem Pasha Mosque and the Kılıç Ali Paşa Mosque.
Contents
[hide]

* 1 History
o 1.1 First church
o 1.2 Second church
o 1.3 Third church (current structure)
o 1.4 Mosque (1453-1935)
o 1.5 Museum (1943-present)
* 2 Architecture
o 2.1 Dome
o 2.2 Lustration urns
o 2.3 Narthex and portals
o 2.4 Upper Gallery
o 2.5 Loge of the Empress
o 2.6 Marble Door
o 2.7 Decorations
* 3 Mosaics
o 3.1 Imperial Gate mosaic
o 3.2 Southwestern entrance mosaic
o 3.3 Apse mosaics
o 3.4 Emperor Alexander mosaic
o 3.5 Empress Zoe mosaics
o 3.6 Comnenus mosaics
o 3.7 Deësis mosaic
o 3.8 Northern tympanon mosaics
o 3.9 20th-century restoration
* 4 Minarets
* 5 See also
* 6 Notes
* 7 References
* 8 Literature
o 8.1 Articles
o 8.2 Mosaics
* 9 External links
o 9.1 Mosaics

[edit] History
[edit] First church

The first church was known as the Μεγάλη Ἐκκλησία (Megálē Ekklēsíā, "Great Church"), or in Latin "Magna Ecclesia",[8] because of its larger dimensions in comparison to the contemporary churches in the City.[2] Inaugurated on 15 February 360 (during the reign of Constantius II) by the Arian bishop Eudoxius of Antioch,[9] it was built next to the area where the imperial palace was being developed. The nearby Hagia Eirene ("Holy Peace") church was completed earlier and served as cathedral until the Hagia Sophia was completed. Both churches acted together as the principal churches of the Byzantine Empire.

Writing in 440, Socrates of Constantinople claimed that the church was built by Constantius II, who was working on it in 346.[9] A tradition which is not older than the 7th - 8th century, reports that the edifice was built by Constantine the Great.[9] Zonaras reconciles the two opinions, writing that Constantius had repaired the edifice consecrated by Eusebius of Nicomedia, after it had collapsed.[9] Since Eusebius was bishop of Constantinople from 339 to 341, and Constantine died in 337, it seems possible that the first church was erected by the latter.[9] The edifice was built as a traditional Latin colonnaded basilica with galleries and a wooden roof. It was preceded by an atrium. It was claimed to be one of the world's most outstanding monuments at the time.

The Patriarch of Constantinople John Chrysostom came into a conflict with Empress Aelia Eudoxia, wife of the emperor Arcadius, and was sent into exile on 20 June 404. During the subsequent riots, this first church was largely burned down.[9] Nothing remains of the first church today.
[edit] Second church
Stone remains of the basilica ordered by Theodosius II, showing the Lamb of God
Marble blocks from the second church

A second church was ordered by Theodosius II, who inaugurated it on 10 October 415. The basilica with a wooden roof was built by architect Rufinus. A fire started during the tumult of the Nika Revolt and burned the second Hagia Sophia to the ground on 13–14 January 532

Several marble blocks from the second church survive to the present; among them are reliefs depicting 12 lambs representing the 12 apostles. Originally part of a monumental front entrance, they now reside in an excavation pit adjacent to the museum's entrance. Discovered in 1935 beneath the western courtyard by A. M. Schneider, further digging was forsaken for fear of impinging on the integrity of the Hagia Sophia.
[edit] Third church (current structure)

On 23 February 532, only a few days after the destruction of the second basilica, Emperor Justinian I elected to build a third and entirely different basilica, larger and more majestic than its predecessors.
Construction of church depicted in codex Manasses Chronicle

Justinian chose physicist Isidore of Miletus and mathematician Anthemius of Tralles as architects; Anthemius, however, died within the first year of the endeavor. The construction is described in the Byzantine historian Procopius' On Buildings (Peri ktismatōn, Latin: De aedificiis). The emperor had material brought from all over the empire - such as Hellenistic columns from the Temple of Artemis at Ephesus, large stones from quarries in porphyry from Egypt, green marble from Thessaly, black stone from the Bosporus region, and yellow stone from Syria. More than ten thousand people were employed. This new church was contemporaneously recognized as a major work of architecture. The theories of Heron of Alexandria may have been utilized to address the challenges presented by building such an expansive dome over so large a space[citation needed]. The emperor, together with the patriarch Eutychius, inaugurated the new basilica on 27 December 537 with much pomp. The mosaics inside the church were, however, only completed under the reign of Emperor Justin II (565–578).

Hagia Sophia was the seat of the Orthodox patriarch of Constantinople and a principal setting for Byzantine imperial ceremonies, such as coronations. The basilica also offered asylum to wrongdoers.

Earthquakes in August 553 and on 14 December 557 caused cracks in the main dome and eastern half-dome. The main dome collapsed completely during a subsequent earthquake on 7 May 558,[citation needed] destroying the ambon, altar, and ciborium. Anyway, the crash was due mainly to the too high bearing load and to the enormous shearing load of the dome, which was too flat. [10] These caused the deformation of the piers which sustained the dome. [10] The emperor ordered an immediate restoration. He entrusted it to Isidorus the Younger, nephew of Isidore of Miletus, who used lighter materials and elevated the dome by "30 feet" [10] (about 6.25 metres (20.5 ft)) - giving the building its current interior height of 55.6 metres (182 ft). [11]Moreover, Isidorus changed the dome type, erecting a ribbed dome with pendentives, whose diameter lied between 32.7 and 33.5 m. [10] This reconstruction, giving the church its present 6th-century form, was completed in 562. The Byzantine poet Paul the Silentiary composed a long epic poem (still extant), known as Ekphrasis, for the rededication of the basilica presided over by Patriarch Eutychius on 23 December 562.

In 726 the emperor Leo the Isaurian issued a series of edicts against the veneration of images, ordering the army to destroy all icons - ushering in the period of Byzantine iconoclasm. At that time, all religious pictures and statues were removed from the Hagia Sophia. After a brief reprieve under Empress Irene (797–802), the iconoclasts made a comeback. Emperor Theophilus (829–842) was strongly influenced by Islamic art,[citation needed] which forbids graven images[clarification needed]. He had a two-winged bronze door with his monograms installed at the southern entrance of the church.

The basilica suffered damage, first in a great fire in 859, and again in an earthquake on 8 January 869, that made a half-dome collapse. Emperor Basil I ordered the church repaired.

After the great earthquake of 25 October 989, which ruined the great dome, the Byzantine emperor Basil II asked for the Armenian architect Trdat, creator of the great churches of Ani and Argina, to repair the dome.[12] His main repairs were to the western arch and a portion of the dome. The extent of the damage required six years of repair and reconstruction; the church was re-opened on 13 May 994.

In his book De caerimoniis aulae Byzantinae ("Book of Ceremonies"), Emperor Constantine VII (913–919) wrote a detailed account of the ceremonies held in the Hagia Sophia by the emperor and the patriarch.
19th Century marker of the tomb of Enrico Dandolo, the Doge of Venice who commanded the Sack of Constantinople in 1204, inside the Hagia Sophia

Upon the capture of Constantinople during the Fourth Crusade, the church was ransacked and desecrated by the Latin Christians. The Byzantine historian Niketas Choniates described the capture of Constantinople; many reputed relics from the church - such as a stone from the tomb of Jesus, the Virgin Mary's milk, the shroud of Jesus, and bones of several saints - were sent to churches in the West and can be seen there now in various museums. During the Latin occupation of Constantinople (1204–1261) the church became a Roman Catholic cathedral. Baldwin I of Constantinople was crowned emperor on 16 May 1204 in Hagia Sophia, at a ceremony which closely followed Byzantine practices. Enrico Dandolo, the Doge of Venice who commanded the sack and invasion of the city by the Latin Crusaders in 1204, is buried inside the church. The tomb inscription carrying his name, which has become a part of the floor decoration, was spat upon by many of the angry Byzantines who recaptured Constantinople in 1261.[citation needed] However, restoration carried out during the period 1847–1849 cast doubt upon the authenticity of the doge's grave; it is more likely a symbolic memorial rather than burial site.

After the recapture in 1261 by the Byzantines, the church was in a dilapidated state. In 1317, emperor Andronicus II ordered four new buttresses (Πυραμὶδας, Greek:"Piramídas") to be built in the eastern and northern parts of the church, financing them with the inheritance of his deceased wife, Irene. [13] New cracks developed in the dome after the earthquake of October 1344, and several parts of the building collapsed on 19 May 1346; consequently, the church was closed until 1354, when repairs were undertaken by architects Astras and Peralta.
[edit] Mosque (1453-1935)

In 1453 Sultan Mehmed laid siege to Constantinople, driven in part by a desire to convert the city to Islam.[14] The Sultan promised his troops three days of unbridled pillage if the city fell, after which he would claim its contents himself.[15][16] The Hagia Sophia was not exempted from the pillage, becoming its focal point as the invaders believed it to contain the greatest treasures of the city.[17] Shortly after the city’s defenses collapsed, pillagers made their way to the Hagia Sophia and battered down its doors.[18] Throughout the siege the Holy Liturgy and Prayer of the Hours were performed at the Hagia Sophia, and the church formed a refuge for many of those who were unable to contribute to the city’s defense.[19][20] Trapped in the church, congregants and refugees became booty to be divided amongst the invaders. The building was desecrated and looted, and occupants enslaved or slaughtered;[17] a few of the elderly and infirm were killed, and the remainder chained.[18] Priests purportedly continued to perform Christian rites until stopped by the invaders.[18] When the Sultan and his cohort entered the church, one of the Ulama climbed the pulpit and recited the Shahada, transforming at once the church into a mosque.[21] [13]
Fountain (Şadırvan) for ritual ablutions
The mihrab located in the apse where the altar used to stand, pointing towards Mecca

As written above, immediately after the conquest of Constantinople in 1453, Mehmed II converted Hagia Sophia into the Ayasofya Mosque.[7] [22] [23] [13] As described by several Western visitors (such as the Córdoban nobleman Pero Tafur[24] and the Florentine Cristoforo Buondelmonti),[25] the church was in a dilapidated state, with several of its doors off; sultan Mehmed II ordered the cleanup of the church and its conversion. He attended the first Friday prayer in the mosque on June 1st, 1453. [23] Hagia Sofia became the first imperial mosque of Istanbul. [26] To the corresponding Waqf were endowed most of the existing houses in the city and the area of the future Topkapi Palace. [13] Through the imperial charters of 1520 / 926H and 1547 / 954 H shops and parts of the Grand Bazaar and other markets were added to the foundation. [13] Before 1481 a small minaret was erected on the SW corner of the building, above the stair tower. [13] Later, the subsequent sultan, Bayezid II (1481–1512), built another minaret at the NE corner. [13] One of these crashed because of the earthquake of 1509, [13] and around the middle of the 16th century they were both replaced by two diagonally opposite minarets built at the E and W corners of the edifice. [13]

In the 16th century the sultan Suleiman the Magnificent (1520–1566) brought back two colossal candles from his conquest of Hungary. They were placed on both sides of the mihrab. During the reign of Selim II (1566–1577), the building started showing signs of fatigue and was extensively strengthened with the addition of structural supports to its exterior by the great Ottoman architect Mimar Sinan, who is also considered one of the world's first earthquake engineers.[27] In addition to strengthening the historic Byzantine structure, Sinan built the two additional large minarets at the western end of the building, the original sultan's loge, and the mausoleum of Selim II to the southeast of the building (then a mosque) in 1577. The mausoleums of Murad III and Mehmed III were built next to it in the 17th century.

Later additions were the sultan's gallery, a minbar decorated with marble, a dais for a sermon and a loggia for a muezzin.

The sultan Murad III (1574–1595) had two large alabaster Hellenistic urns transported from Pergamon and placed on two sides of the nave.

Sultan Mahmud I ordered the restoration of the building in 1739 and added a medrese (a Koranic school, now the library of the museum), a soup kitchen (for distribution to the poor) and a library, and in 1740 a fountain for ritual ablutions (Şadirvan), thus transforming it into a külliye, i.e. a social complex. At the same time a new sultan's gallery and a new mihrab were built inside.

The most famous restoration of the Hagia Sophia was ordered by Sultan Abdülmecid and completed by eight hundred workers between 1847 and 1849, under the supervision of the Swiss-Italian architect brothers Gaspare and Giuseppe Fossati. The brothers consolidated the dome and vaults, straightened the columns, and revised the decoration of the exterior and the interior of the building. The mosaics in the upper gallery were cleaned. The old chandeliers were replaced by new pendant ones. New gigantic circular-framed disks or medallions were hung on columns. They were inscribed with the names of Allah, the Prophet Muhammad, the first four caliphs Abu Bakr, Umar, Uthman and Ali, and the two grandchildren of Mohammed: Hassan and Hussain, by the calligrapher Kazasker İzzed Effendi (1801–1877). In 1850 the architect Fossati built a new sultan's gallery in a Neo-Byzantine style connected to the royal pavilion behind the mosque. Outside the Hagia Sophia, a timekeeper's building and a new madrasah were built. The minarets were altered so that they were of equal height. When the restoration was finished, the mosque was re-opened with ceremonial pomp on 13 July 1849.
[edit] Museum (1943-present)

In 1935, the first Turkish President and founder of the Republic of Turkey, Mustafa Kemal Atatürk, transformed the building into a museum. The carpets were removed and the marble floor decorations such as the Omphalion appeared for the first time in centuries, while the white plaster covering many of the mosaics was removed. Nevertheless, the condition of the structure deteriorated, and the World Monuments Fund placed Hagia Sophia on 1996 World Monuments Watch, and again in 1998. The building's copper roof had cracked, causing water to leak down over the fragile frescoes and mosaics. Moisture entered from below as well. Rising ground water had raised the level of humidity within the monument, creating an unstable environment for stone and paint. With the help of financial services company American Express, WMF secured a series of grants from 1997 to 2002 for the restoration of the dome. The first stage of work involved the structural stabilization and repair of the cracked roof, which was undertaken with the participation of the Turkish Ministry of Culture. The second phase, the preservation of the dome’s interior, afforded the opportunity to employ and train young Turkish conservators in the care of mosaics. By 2006, the WMF project was complete, though other areas of Hagia Sophia continue to require conservation.[28]

Today, use of the complex as a place of worship (mosque or church) is strictly prohibited.[29] However, in 2006, it was reported that the Turkish government allowed the allocation of a small room in the museum complex to be used as a prayer room for Christian and Muslim museum staff.[30]

Turkish fine arts photographer Ahmet Ertuğ's close-up pictures of the restored mosaics can be viewed in the upper northern gallery of the Hagia Sophia in a permanent exhibition.[31]
[edit] Architecture
A section of the original architecture of Hagia Sophia
Groundplan of the Hagia Sophia
One of the mighty stone columns with metal clasps

Hagia Sophia is one of the greatest surviving examples of Byzantine architecture. Of great artistic value was its decorated interior with mosaics and marble pillars and coverings. The temple itself was so richly and artistically decorated that Justinian proclaimed, "Solomon, I have outdone thee!" (Νενίκηκά σε Σολομών). Justinian himself had overseen the completion of the greatest cathedral ever built up to that time, and it was to remain the largest cathedral for 1,000 years up until the completion of the cathedral in Seville in Spain.

Justinian's basilica was at once the culminating architectural achievement of late antiquity and the first masterpiece of Byzantine architecture. Its influence, both architecturally and liturgically, was widespread and enduring in the Eastern Orthodox, Roman Catholic, and Muslim worlds alike. The largest columns are of granite, about 19 or 20 metres high and at least 1.5 metres in diameter; the largest weigh well over 70 tons apiece. Under Justinian's orders, eight Corinthian columns were disassembled from Baalbek, Lebanon and shipped to Constantinople for the construction of Hagia Sophia.[32]

The vast interior has a complex structure. The nave is covered by a central dome 55.6 metres (182 ft 5 in) from floor level, supported in part by an arcade of 40 arched windows. Repairs to structure have left the dome somewhat elliptical - with the diameter varying between 31.24 m (102 ft 6 in) and 30.86 m (101 ft 3 in).

The dome is carried on four concave triangular pendentives that serve to transition from the circular base of the dome to its rectangular base.[33] The weight of the dome passes through the pendentives to four massive piers at the corners; these were reinforced with buttresses during Ottoman times, under the guidance of the architect Mimar Sinan.

At the western entrance and eastern liturgical side, the arched openings are extended by half domes carried on smaller semi-domed exedras; a hierarchy of dome-headed elements built up to create a vast oblong interior, crowned by the main dome. Despite all of the aforementioned features, the weight of the dome remained a problem, requiring the addition of external buttresses.

Interior surfaces are sheathed with polychrome marbles, green and white with purple porphyry, and gold mosaics.

The exterior, clad in stucco, was tinted yellow and red during a restorations in the 19th century on the direction of the architect Fossati.
[edit] Dome
See also: List of Byzantine inventions
Interior of the Hagia Sophia by John Singer Sargent, 1891

The dome of Hagia Sophia has spurred particular interest for many art historians, architects and engineers because of the innovative way the original architects envisioned the dome. The dome is supported by pendentives which had never been used before the building of this structure. The pendentive enables the dome to transition gracefully into the square shape of the piers below. The pendentives not only achieve a pleasing aesthetic quality, but they also restrain the lateral forces of the dome and allow the weight of the dome to flow downward.
Hagia Sophia Dome Paintings, Photographed in 2010. The face of one of the four cherubs (the one in the upper left corner) covered by the Ottomans, is visible again since 2009.

Although this design stabilizes the dome and the surrounding walls and arches, the actual construction of the walls of Hagia Sophia weakened the overall structure. The bricklayers used more mortar than brick, which weakened the walls. The structure would have been more stable if the builders at least let the mortar cure before they began the next layer; however, they did not do this. When the dome was placed atop the building, the weight of the dome caused the walls to lean outward because of the wet mortar underneath. When Isidorus the Younger rebuilt the original dome, he had to first build up the interior of the walls so that they were vertical in order to support the weight of the new dome. Another probable change in the design of the dome when it was rebuilt was the actual height of the dome. Isidore the Younger raised the height of the dome by approximately six metres so that the lateral forces would not be as strong and the weight of the dome would flow more easily down the walls.

A second interesting fact about the original structure of the dome was how the architects were able to place forty windows around the base of the dome. Hagia Sophia is famous for the mystical quality of light that reflects everywhere in the interior of the nave, which gives the dome the appearance of hovering above the nave. This design is possible because the dome is shaped like a scalloped shell or the inside of an umbrella with ribs that extend from the top of the dome down to the base. These ribs allow the weight of the dome to flow between the windows, down the pendentives, and ultimately to the foundation.

The unique character of the design of Hagia Sophia shows how this structure is one of the most advanced and ambitious monuments of late antiquity.
[edit] Lustration urns
Lustration urn from Pergamon

Two huge marble lustration urns were brought from Pergamon during the reign of Sultan Murad III. Originally from the Hellenistic period, they are carved from single blocks of marble.
[edit] Narthex and portals
Imperial Gate

The Imperial Gate was the main entrance between the exo- and esonarthex. It was reserved only for the emperor. The Byzantine mosaic above the portal depicts Christ and Emperor Leo VI the Wise.

A long ramp from the northern part of the outer narthex leads up to the upper gallery.
[edit] Upper Gallery

The upper gallery is laid out in a horseshoe shape that encloses the nave until the apse. Several mosaics are preserved in the upper gallery, an area traditionally reserved for the empress and her court. The best-preserved mosaics are located in the southern part of the gallery.
[edit] Loge of the Empress
The Loge of the Empress

The Loge of the Empress is located in the centre of the upper enclosure, or gallery, of the Hagia Sophia. From there the empress and the court-ladies would watch the proceedings down below. A round, green stone marks the spot where the throne of the empress stood.
[edit] Marble Door
Marble Door

The Marble Door inside the Hagia Sophia is located in the southern upper enclosure, or gallery. It was used by the participants in synods, they entered and left the meeting chamber through this door.
[edit] Decorations

Originally, under Justinian's reign, the interior decorations consisted of abstract designs of the marble slabs on the walls and mosaics on the curving vaults. Of these, one can still see the two archangels Gabriel and Michael in the spandrels of the bema. There were already a few figurative decorations, as attested by the eulogy of Paul the Silentiary. The spandrels of the gallery are revetted in opus sectile, showing patterns and figures of flowers and birds in precisely cut pieces of white marble set against a background of black marble. In later stages figurative mosaics were added, which were destroyed during the iconoclastic controversy (726–843). Present mosaics are from the post-iconoclastic period. The number of treasures, relics and miracle-working, painted icons of the Hagia Sophia grew progressively richer into an amazing collection. Apart from the mosaics, a large number of figurative decorations were added during the second half of the 9th century: an image of Christ in the central dome; Orthodox saints, prophets and Church Fathers in the tympana below; historical figures connected with this church, such as Patriarch Ignatius; some scenes from the gospel in the galleries. Basil II let paint on each of the four pendentives a giant six-winged Cherub.[34] The Ottomans covered their face with a golden halo,[34] but in 2009 one of them has been restored to the original state.[35]
[edit] Mosaics
Mosaics with geometric pattern decorate the upper imperial gallery

The church was richly decorated with mosaics throughout the centuries. They either depicted the Virgin Mother, Jesus, saints, or emperors and empresses. Other parts were decorated in a purely decorative style with geometric patterns.

During the Sack of Constantinople in 1204, the Latin Crusaders vandalized valuable items in every important Byzantine structure of the city, including the golden mosaics of the Hagia Sophia. Many of these items were shipped to Venice, whose Doge, Enrico Dandolo, had organized the invasion and sack of Constantinople.

Following the building's conversion into a mosque in 1453, many of its mosaics were covered with plaster, due to Islam's ban on representational imagery. This process was not completed at once, and reports exist from the 17th century in which travellers note that they could still see Christian images in the former church. In 1847–49, the building was restored by two Swiss Italian brothers, Gaspare and Giuseppe Fossati, and Sultan Abdülmecid allowed them to also document any mosaics they might discover during this process. This work did not include repairing the mosaics and after recording the details about an image, the Fossatis painted it over again. This work included covering the previously uncovered faces of two seraphim mosaics located in the centre of the building. The building currently features a total of four of these images and two of them are restorations in paint created by the Fossatis to replace two images of which they could find no surviving remains. In other cases, the Fossatis recreated damaged decorative mosaic patterns in paint, sometimes redesigning them in the process. The Fossati records are the primary sources about a number of mosaic images now believed to have been completely or partially destroyed in an earthquake in 1894. These include a great mosaic of Christ Pantocrator in the dome, a mosaic over a now-unidentified Door of the Poor, a large image of a jewel-encrusted cross, and a large number of images of angels, saints, patriarchs, and church fathers. Most of the missing images were located in the building's two tympana. The Fossatis also added a pulpit (minbar) and the four large medallions on the walls of the nave bearing the names of Muhammad and Islam's first caliphs.
Imperial gate mosaics
[edit] Imperial Gate mosaic

* Imperial Gate mosaics: located in the tympanum above the gate, used only by the emperors when entering the church. Based on style analysis, it has been dated to the late 9th or early 10th century. The emperor with a nimbus or halo could possibly represent emperor Leo VI the Wise or his son Constantine VII Porphyrogenitus bowing down before Christ Pantocrator, seated on a jeweled throne, giving His blessing and holding in His left hand an open book.[36] The text on the book reads as follows: "Peace be with you. I am the light of the world". (John 20:19; 20:26; 8:12) On each side of Christ's shoulders is a circular medallion: on His left the Archangel Gabriel , holding a staff, on His right His Mother Mary.

[edit] Southwestern entrance mosaic
Virgin and Child flanked by Justinian I and Constantine I

* Southwestern entrance mosaics, situated in the tympanum of the southwestern entrance, date from 944. They were rediscovered during the restorations of 1849 by Fossati. The Virgin sits on a throne without a back, her feet resting on a pedestal, embellished with precious stones. The Child Christ sits on her lap, giving His blessing and holding a scroll in His left hand. On her left side stands emperor Constantine in ceremonial attire, presenting a model of the city to Mary. The inscription next to him says: "Great emperor Constantine of the Saints". On her right side stands emperor Justinian I, offering a model of the Hagia Sophia. The medallions on both sides of the Virgin's head carry the monograms MP and ΘY, an abbreviation of "Mētēr" and "Theou", meaning "Mother of God".


[edit] Apse mosaics
Apse mosaic of the Theotokos (Virgin Mother and Child)

* Virgin and Child: this was the first of the post-iconoclastic mosaics. It was inaugurated on 29 March 867 by Patriarch Photius and the emperors Michael III and Basil I. This mosaic is situated in a high location on the half dome of the apse. Mary is sitting on a throne without a back, holding the Child Jesus on her lap. Her feet rest on a pedestal. Both the pedestal and the throne are adorned with precious stones. These mosaics were believed to be a reconstruction of the mosaics of the 6th century that were previously destroyed during the iconoclastic era by the Byzantines of that time, as represented in the inaugural sermon by the patriarch Photios. However, no record of figural decoration of Hagia Sophia exists before this time. The mosaics are set against the original golden background of the 6th century. The portraits of the archangels Gabriel and Michael (largely destroyed) in the bema of the arch also date from the 9th century.

[edit] Emperor Alexander mosaic

* The Emperor Alexander mosaic is not easy to find for the first-time visitor, located in the second floor in a dark corner of the ceiling. It depicts Emperor Alexander in full regalia, holding a scroll in his right hand and a globus cruciger in his left. A drawing by Fossati showed that the mosaic survived until 1849, and that Thomas Whittemore, founder of the Byzantine Institute of America who was granted permission to preserve the mosaics, assumed that it had been destroyed in the earthquake of 1894. Eight years after his death, the mosaic was discovered in 1958 largely through the researches of Robert Van Nice. Unlike most of the other mosaics in Hagia Sophia, which had been covered over by ordinary plaster, the Alexander mosaic was simply painted over and reflected the surrounding mosaic patterns and thus was well hidden. It was duly cleaned by the Byzantine Institute's successor to Whittemore, Paul A. Underwood.[37]

[edit] Empress Zoe mosaics
Empress Zoe mosaics

* The Empress Zoe mosaics on the eastern wall of the southern gallery date from the 11th century. Christ Pantocrator, clad in the dark blue robe (as always the custom in Byzantine art), is seated in the middle against a golden background, giving His blessing with the right hand and holding the Bible in His left hand. On either side of His head are the monograms IC and XC, meaning Iēsous Khristos. He is flanked by Constantine IX Monomachus and Empress Zoe, both in ceremonial costumes. He is offering a purse, as symbol of the donation he made to the church, while she is holding a scroll, symbol of the donations she made. The inscription over the head of the emperor says : "Constantine, pious emperor in Christ the God, king of the Romans, Monomachus". The inscription over the head of the empress reads as follows : "Zoë, the very pious Augusta". The previous heads have been scraped off and replaced by the three present ones. Perhaps the earlier mosaic showed her first husband Romanus III Argyrus or her adopted son Michael IV. Another theory is that these mosaics were made for an earlier emperor and empress, with their heads changed into the present ones.

*

[edit] Comnenus mosaics
Comnenus mosaic

* The Comnenus mosaics, equally located on the eastern wall of the southern gallery, date from 1122. The Virgin Mary is standing in the middle, depicted, as usual in Byzantine art, in a dark blue gown. She holds the Child Christ on her lap. He gives His blessing with His right hand while holding a scroll in His left hand. On her right side stands emperor John II Comnenus, represented in a garb embellished with precious stones. He holds a purse, symbol of an imperial donation to the church. Empress Irene stands on the left side of the Virgin, wearing ceremonial garments and offering a document. Their eldest son Alexius Comnenus is represented on an adjacent pilaster. He is shown as a beardless youth, probably representing his appearance at his coronation aged seventeen. In this panel one can already see a difference with the Empress Zoe mosaics that is one century older. There is a more realistic expression in the portraits instead of an idealized representation. The empress is shown with plaited blond hair, rosy cheeks and grey eyes, revealing her Hungarian descent. The emperor is depicted in a dignified manner.

[edit] Deësis mosaic

Mosaic-1041.jpg
The Deësis mosaic with Christ as ruler
Detail of Deësis mosaic

* The Deësis ('Δέησις' in Greek, meaning Entreaty) mosaic probably dates from 1261. It was commissioned to mark the end of 57 years of Roman Catholic use and the return to the Orthodox faith. It is the third panel situated in the imperial enclosure of the upper galleries. It is widely considered the finest in Hagia Sophia, because of the softness of the features, the humane expressions and the tones of the mosaic. The style is close to that of the Italian painters of the late 13th or early 14th century, such as Duccio. In this panel the Virgin Mary and John the Baptist (Ioannes Prodromos), both shown in three-quarters profile, are imploring the intercession of Christ Pantocrator for humanity on Judgment Day. The bottom part of this mosaic is badly deteriorated. This mosaic is considered as the beginning of the Renaissance in Byzantine pictorial art.

[edit] Northern tympanon mosaics
Mosaic in the northern tympanon depicting Saint John Chrysostom

* The northern tympanon mosaics feature various saints. They have been able to survive due to the very high and unreachable location. They depict Saints John Chrysostom and Ignatius the Younger standing, clothed in white robes with crosses, and holding richly jewelled Holy Bibles. The names of each saint is given around the statues in Greek, in order to enable an identification for the visitor. The other mosaics in the other tympani have not survived probably due to the frequent earthquakes as opposed to any deliberate destruction by the Ottoman conquerors.

[edit] 20th-century restoration
The interior of the dome undergoing restoration

A large number of mosaics were uncovered in the 1930s by a team from the Byzantine Institute of America led by Thomas Whittemore. The team chose to let a number of simple cross images remain covered by plaster, but uncovered all major mosaics found.

Because of its long history as both a church and a mosque, a particular challenge arises in the restoration process. The Christian iconographic mosaics are being gradually uncovered. However, in order to do so, important, historic Islamic art would have to be destroyed. Restorers have attempted to maintain a balance between both Christian and Islamic cultures. In particular, much controversy rests upon whether the Islamic calligraphy on the dome of the cathedral should be removed, in order to permit the underlying Pantocrator mosaic of Christ as Master of the World, to be exhibited (assuming the mosaic still exists).[citation needed]
[edit] Minarets

One of the minarets (at southwest) was built from red brick while the other three were built from white limestone and sand stone; of which the slender one at northeast was erected by Sultan Bayezid II while the two larger minarets at west were erected by Sultan Selim II and designed by the famous Ottoman architect Mimar Sinan.[citation needed]
[edit] See also

* Church of the Holy Apostles — formerly the second most important church of Constantinople
* Hagia Irene — neighbouring church
* Chora Church — the best preserved Byzantine church in Istanbul, now a museum too
* Oldest churches in the world
* Pammakaristos Church; its parekklesion - also a museum - is decorated with beautiful mosaics
* Haseki Hürrem Sultan Hamamı — bath commissioned by Roxelana for the Hagia Sophia community
* Caferağa Medresseh — former Koranic school next to Hagia Sophia
* Soğukçeşme Sokağı — historical street between the Hagia Sophia and Topkapı Palace
* Saint Sophia Cathedral in Kiev
* Saint Sophia Cathedral in Novgorod
* Saint Sophia Cathedral in Polotsk
* Hagia Sophia Church (Sofia)
* Saint Clement Catholic Church, Chicago — the designer was said to have been influenced by Hagia Sophia
* List of megalithic sites
* Conversion of non-Muslim places of worship into mosques

[edit] Notes

1. ^ Magdalino, Paul, et. al. "Istanbul: Buildings, Hagia Sophia" in Grove Art Online. Oxford Art Online. http://www.oxfordartonline.com. accessed 28 Feb. 2010.
2. ^ a b c Janin (1953), p. 471.
3. ^ McKenzie, Steven L. (1998). The Hebrew Bible Today: An Introduction to Critical Issues. M. Patrick Graham. Louisville, KY: Westminster John Knox Press. p. 149. ISBN 0-6642-5652-X.
4. ^ Binns, John (2002). An Introduction to the Christian Orthodox Churches. Cambridge: Cambridge University Press. p. 57. ISBN 0-5216-6738-0.
5. ^ Simons, Marlise (22 August 1993). "Center of Ottoman Power". New York Times. http://www.nytimes.com/1993/08/22/travel/center-of-ottoman-power.html. Retrieved 2009-06-04.
6. ^ Kleiner, Fred S.; Christin J. Mamiya (2008). Gardner's Art Through the Ages: Volume I, Chapters 1-18 (12th ed.). Mason, OH: Wadsworth. p. 329. ISBN 0495467405.
7. ^ a b "Hagia Sophia." ArchNet.
8. ^ Alessandro E. FONI, George PAPAGIANNAKIS, Nadia MAGNENAT-THALMANN. "Virtual Hagia Sophia: Restitution, Visualization and Virtual Life Simulation" (PDF). Archived from the original on 2007-07-09. http://web.archive.org/web/20070709194035/http://www.virtualworldheritage.org/papers/3181_976-Virtual_Hagia_Sophia.pdf. Retrieved 2007-07-03.
9. ^ a b c d e f Janin (1953), p. 472.
10. ^ a b c d Müller-Wiener (1977), p. 86.
11. ^ Emporis: Haghia Sophia
12. ^ Maranci, Christina. "The Architect Trdat: Building Practices and Cross-Cultural Exchange in Byzantium and Armenia." Journal of the Society of Architectural Historians, Vol. 62, No. 3, Sep. 2003, pp. 294-305.
13. ^ a b c d e f g h i Müller-Wiener (1977), p. 91.
14. ^ Ali, Daniel and Spencer, Robert. Inside Islam. West Chester: Ascension Press, 2003, pp. 108-110, 112-118.
15. ^ Runciman, Steven (1965). The Fall of Constantinople, 1453. Cambridge: Cambridge University Press. p. 145. ISBN 0-5213-9832-0.
16. ^ Nicol, Donald M. The End of the Byzantine Empire. London: Edward Arnold Publishers, 1979, p. 88.
17. ^ a b Nicol. The End of the Byzantine Empire, p. 90.
18. ^ a b c Runciman. The Fall of Constantinople, p. 147.
19. ^ Runciman. The Fall of Constantinople, pp. 133-134.
20. ^ Nicol, Donald M. The Last Centuries of Byzantium 1261-1453. Cambridge: Cambridge University Press, 1972, p. 389.
21. ^ Runciman. The Fall of Constantinople, p. 149.
22. ^ Janin (1953), p. 475.
23. ^ a b Mamboury (1953), p. 288.
24. ^ Tafur, Pero (1926). Travels and Adventures, 1435-1439. Trans. M. Letts. London: G. Routledge. pp. 138–148.
25. ^ G. Gerola, “Le vedute di Costantinopoli di Cristoforo Buondemonti,” SBN 3 (1931): 247–79.
26. ^ Necipoglu (2005), pg. 13
27. ^ Mungan, I. (2004). Hagia Sophia and Mimar Sinan. Mungan & Wittek (eds); Taylor & Francis Group, London. pp. 383–384. ISBN 90 5809 642 4. http://books.google.be/books?hl=nl&lr=&id=6j5nuvAd44QC&oi=fnd&pg=PA383&dq=Sinan+earthquake+%22Hagia+Sophia%22&ots=HFASNZ8r-P&sig=zS-hO7E6RtwfhN55LGn6ulpRIE0#PPA383,M1.
28. ^ World Monuments Fund - Hagia Sophia
29. ^ http://www.istanbul.gov.tr/Default.aspx?pid=343
30. ^ İbadete açık Ayasofya (Turkish)
31. ^ Index of Ahmet Ertuğ's exhibitions.
32. ^ ____ Baalbek keeps its secrets
33. ^ Kleiner and Mamiya. Gardner's Art Through the Ages, p. 331.
34. ^ a b Mamboury (1953), p. 287
35. ^ Ronchey (2010), p. 157
36. ^ The Hagia Sophia Church
37. ^ Lord Kinross. "Hagia Sophia: A History of Constantinople." Newsweek,