Hasankeyf is located at the Tigris River in the Turkish province of Batman. A fortress was built by Byzantines in the 4th century. In the 7th century Arabs conquered the place. In the 12th century the city became a center under the reign of Turkish Artuklu (Artuqids). 1232 Arabic Ayubids controlled the city, in 1260 it was captured by Mongols. Until Hasankeyf became part of the Ottoman Empire during the 16th century, it was under the reign of Akkoyunlu, the “White Sheep” Turkomans.