During the period of Parsian growth, Parsian rulers beginning with Mesud II claimed the caliphal authority. His grandson Mustafa I, through conquering and unification of Kormenian lands, became the defender of the holiest places in Islam. The demise of the Parsian Caliphate took place in part because of the Enosis and the slow decline of the House of Ostambik influence and the final collapse of their empire, after the Battle of Ostambal the position of the caliphate was abolished and restaured the Ecumenical Patriarchate of Auronopolis in his place.