the ancient ruins of zerzevan castle in eastern turkey

ancient civilization rome castle city wall walls civilisation culture diyarbakir province history kurdish kurdistan roman empire ruins tigris river turkey turkiye zerzevan eastern civilization ancient rome castle diyarbakir history kurdistan tigris river people travel old cave ancient nature architecture famous place rock object city stone material empire archaeology antiquities ruined sandstone turkish culture mardin diyarbak?r province old ruin travel destinations roman architectural column monument antique sky building exterior cultures arch architectural feature religion east architectural feature mesopotamian landscape scenery summer