Hasankeyf (Ar. Ḥiṣn Kayfā, Ḥiṣn; Ott. Ḥıṣn-ı Keyf) is a town on the upper Tigris east of Āmid/Diyarbakır, in present-day southeastern Turkey. The bulk of the early settlement lay on easy ground south of the Tigris, and in the fourth/tenth century, it appears to have spread to the north bank. The fortress stood on cliffs above the main settlement, with which it was connected by a paved road descending past decorated gateways. An impressive bridge, probably built in 510/1116-7 (though this date does not