Fodor's Expert Review İç Kale

The inner castle of Diyarbakır's old town is a circular fortress that once held the city's palace and other important buildings. Beside it stands the 16th-century Hazreti Süleymaniye Cami, which contains the grave of the son of Khalid ibn al-Walid, the companion of the prophet Muhammad who died during the city's capture. It has a tall, graceful minaret and is striped with black basalt and pale sandstone, a favorite design of this city's medieval architects. Its courtyard fountain is fed by an underground spring that has supplied cold, clear water to the city for 5,000 years. It has undergone extensive research in recent years and now holds the city's fantastic Archaeological Museum in one of the renovated court buildings. There's also an Atatürk Museum (as it seems no Turkish city is complete without one) and the early Byzantine Church of St. George, which with its two impressive domes is worth a visit.