Zengid dynasty
The Byzantine Empire regained control in 1031, though it did not remain under their rule long and changed hands several times before the end of the century. The County of Edessa, one of the Crusader states set up after the success of the First Crusade, was centred on the city, the crusaders having seized the city from the Seljuks. The county survived until the 1144 Siege of Edessa, in which Imad al-Din Zengi, founder of the Zengid dynasty, captured the city and, according to Matthew of Edessa, killed many of the Edessenes. The Turkic Zengid dynasty's lands were eventually absorbed by the Ottoman Empire in 1517 after the 1514 Battle of Chaldiran.