Flag of the Greek Orthodox Church Button

Flag of the Greek Orthodox Church. The design of the flag sometimes dubbed the "Byzantine imperial flag", and is considered—somewhat correctly—to have been the actual historical banner of the Byzantine Empire. The double-headed eagle was historically used as an emblem in the late Byzantine period (14th–15th centuries), but rarely on flags; rather it was embroidered on imperial clothing and accoutrements by both the Palaiologos emperors of the Byzantine Empire and the Grand Komnenos rulers of the Empire of Trebizond, descendants of the Byzantine imperial family of the same name.