Constantine VII

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Constantine VII Porphyrogennetos or Porphyrogenitus, "the Purple-born" (Greek: Κωνσταντίνος Ζ΄ Πορφυρογέννητος, Kōnstantinos VII Porphyrogennētos), (September 2, 905 – November 9, 959) was the son of the Byzantine emperor Leo VI and his fourth wife Zoe Karbonopsina. He was also the nephew of the Emperor Alexander. He wrote two descriptive books, De Administrando Imperio and De Ceremoniis.