Bishop, diplomat, and confessor
Michael's career joined ecclesiastical office to imperial service. Consecrated to Synnada by Tarasius and present at the Second Council of Nicaea in 787, he was repeatedly entrusted with embassies for the Byzantine court: by tradition he led a mission to Charlemagne under Nicephorus I, served as an envoy during Harun al-Rashid's campaign, and headed a later legation to the Frankish court that also carried the enthronement letter of a new patriarch to Pope Leo III in Rome.