The early medieval Armenian Church enjoyed the great political support of the Iranian kings and Arab caliphs in the course of the century-old struggle against the attempts of the Byzantine Empire to spread the Chalcedonianism in Armenia and throughout the Christian Orient. The Armenian Church openly condemned the Chalcedonian wording of the creed at the Council of Duin in 554 and confirmed its own official dogma of belief. The events resulted in a well-known nationalization of one of the oldest orthodox churches in the Middle East. Thanks to the fact the Armenian Church was able to defend its autocephaly in those very hard conditions and even to keep the katholikosate of neighboring Albania under its church and canonic jurisdiction with the limited autocephaly. It also managed to do the same Eastern Georgia - Kartli - up to the beginning of 7-th century.