The Yazidi Empire (Kurdish: ئێـزيدي ﺷـخـوبی Keyeksera Êzîdiyê), also called Kurdish Empire, was a Medieval empire of Yazidi Kurdish origin that ruled the Middle East between the second half of the 12th century and the first half of the 13th. Originally it was as a Kurdish religious revolutionary movement founded by Shex Adi that took advantage of the power vacuum in the Great Seljuk Empire to extending their control over Upper Mesopotamia. Adi is considered by the Yazidi an avatar of Melek Taus, the main divinity in their faith. Despite his premature death (1162), his father-in-law and general, Shirkuh took his title and increased the Yazidi power in Mesopotamia and Syria. In 1169, the Kurds invade Egypt and subsequently expelling the Crusaders to Holy Land (1171). Under Selahedin rule, Ctesiphon was conquered (1174) ending the Great Seljuk Empire and signed a peace treaty with the Khwarazmian Empire to divide the Seljukian territories.