In the Eastern Empire, sworn adherence to Christian orthodoxy became a prerequisite of Imperial accession – Anastasius I signed a document attesting his obedience to orthodox doctrine and practice. He is the last emperor known to be consecrated as "divus" on his death (AD 518). The title appears to have been abandoned on grounds of its spiritual impropriety but the consecration of Eastern emperors continued: they held power through divine ordinance and their rule was the manifestation of sacred power on earth. The "adventus" and the veneration of the Imperial image continued to provide analogies for devotional representations (Icons) of the heavenly hierarchy and the rituals of the Orthodox Church.