The Sheikh Sultan Zawiyah which was built on a slope overlooking the south bank of the Tigris River was the final excavation site of Hasankeyf in 2011. A part of the zawiyah on the riverside collapsed due to landsliding and fell down while a larger portion has currently remained under a quarry. The structures believed to be part of a church during initial surveys were unearthed to identify its actual function. Zawiyah consists of a tomb built in a small courtyard, lodging units for dervishes, kitchen and cellar rooms. The tomb, as the most sound structure, was damaged by the treasure hunters, and other sections have been demolished to the foundation level . The zawiyah was dated to the 15th century based on the material and construction technique.