as many as 500,000 residents, preceding such medieval metropolises as Constantinople and Baghdad. Mongols in Merv In 1221, Merv opened its gates to Tolui, son of Genghis Khan, chief of the Mongols. Most of the inhabitants are said to have been butchered. Arab historian Ibn al-Athir described the event basing his report on the narrative of Merv refugees: Genghis Khan sat on a golden throne and ordered the troops who had been seized should be brought before him. When they were in front of him, they were executed and the people looked on and wept. When it came to the common people, they separated men, women, children and possessions. It was a memorable day for shrieking and weeping and wailing. They took the wealthy people and beat them and tortured them with all sorts of cruelties in the search for wealth ... Then they set fire to the city and burned the tomb of Sultan Sanjar and dug up his grave looking for money. They said, 'These people have resisted us' so they killed them all. Then Genghis Khan ordered that the dead should be counted and there were around 700,000 corpses. A Persian historian, Juvayni, put the figure at more than 1,300,000. Each individual soldier of the conquering army "was allotted the execution of three to four hundred persons," many of those soldiers being levies from Sarakhs who, because of their town's enmity toward Merv, "exceeded the ferocity of the heathen Mongols in the slaughter of their fellow-Muslims." Almost the entire population of Merv, and refugees arriving from the other parts of the Khwarazmian Empire, were slaughtered, making it one of the bloodiest captures of a city in world history. Excavations revealed the drastic rebuilding of the city's fortifications in the aftermath of their destruction, but the city's prosperity had passed. The Mongol invasion spelled the eclipse of Merv and other major centres for more than a century. After the Mongol conquest, Merv became part of the Ilkhanate, and it was consistently looted by Chagatai Khanate. In the early part of the 14th century, the town became the seat of a Christian archbishopric of the Eastern Church under the rule of the Kartids, vassals of the Ilkhanids. By 1380 Merv belonged to the empire of Timur (Tamerlane). Uzbeks in Merv and its final destruction In 1505, the Uzbeks occupied Merv; five years later, Shah Ismail, the founder of the