In the center of the old city is the Ulu Cami, one of the oldest mosques in Anatolia. Though the present form dates from 1091, its colonnades incorporate elements of the Byzantine Cathedral of St. Thomas that once stood here. Its design follows earlier Arab tradition and closely resembles the great Ummayid Mosque of Damascus. Note the Arabic-style flat roof and almost basilica-like rectangular plan, different from the square-shape and domed mosques common in Turkey.
Gazi Cad., opposite Yapı Kredi Bank, Diyarbakır, Turkey