Locat­ed on an escarp­ment of the Upper Tigris Riv­er Basin that is part of the so-called Fer­tile Cres­cent, the for­ti­fied city of Diyarbak?r and the land­scape around has been an impor­tant cen­tre since the Hel­lenis­tic peri­od, through the Roman, Sas­sanid, Byzan­tine, Islam­ic and Ottoman times to the present. The site encom­pass­es the Inner cas­tle, known as Ickale and includ­ing the Ami­da Mound, and the 5.8 km-long city walls of Diyarbak?r with their numer­ous tow­ers, gates, but­tress­es, and 63 inscrip­tions. The site also includes the Hevsel Gar­dens, a green link between the city and the Tigris that sup­plied the city with food and water, the Anzele water source and the Ten-Eyed Bridge.