The inside of the Ulu Camii or Great Mosque. It was built in 1156-57 on the orders of Fahreddin Karaarslan, the ruler of Harput when it was ruled by the Artukoğlus. It is the oldest building of Harput, and one of the oldest mosques in Anatolia. Its walls are made of rubble stone and its dome, arches and minaret and bricks.