 After Arghun 's death , he was followed in rapid succession by two brief and fairly ineffective leaders , one of whom only held power for a few months . Stability was restored when Arghun 's son Ghazan took power in 1295 , though to secure cooperation from other influential Mongols , he made a public conversion to Islam when he took the throne , marking a major turning point in the state religion of the Ilkhanate . Despite being an official Muslim , however , Ghazan remained tolerant of multiple religions , and worked to maintain good relations with his Christian vassal states such as Cilician Armenia and Georgia . 
