historical
Κωνσταντῖνος Ζ' Πορφυρογέννητος
Byzantine emperor (905–959), author of the De Ceremoniis aulae byzantinae (Ἔκθεσις τῆς βασιλείου τάξεως), the principal source for Byzantine court ceremonial including the August procession of the True Cross.
Mentioned in 1 passage.