The Arap Baba Mosque is a small 13th-century building near the centre of Harput. It is famous less for the architecture than for what lies in the crypt below: a mummified body, displayed under glass, said to be that of a 13th-century holy man who fasted himself to death.
The mummy is a genuine local cult site — visitors leave money and tie ribbons to the railings asking for help. The atmosphere is more village shrine than tourist attraction. Photos in the crypt are discouraged; dress modestly.