sentences:  Despite his faithfulness to Christianity, Muslim influence in the region had pervaded and influenced the culture and customs of the Christians living in Georgia and Armenia, especially after the Seljuk Turks invaded the Caucasus.Byzantine art scholar Anthony Eastmond, for example, notes that "many of the outward manifestations of [Hasan-Jalal's] rule were presented through Islamic customs and titles, most notably in his depiction on his principal foundation of Gandzasar.