main caliphal palace at samarra, iraq, known in arabic as dar al-khilafa (abode of the caliphate) or qasr al-khalifa

samarra iraq palace calipha pool abbasid caliphal architecture building ancient tourism landmark travel asia old attraction history east mosque culture sightseeing world heritage historical archaeology ruins city historic minaret monument religion spiral wall antique landscape great islamic worship tower prayer al khalifa asian spiritual destination assyria art excavations archaeological islam