Constantine VII - Basileus of Basileía Rhōmaíōn from 913 to 959
Constantine VII was the fourth Emperor of the Macedonian dynasty of the Byzantine Empire, reigning from 913 to 959. He was the son of the emperor Leo VI and his fourth wife, Zoe Karbonopsina, and the nephew of his predecessor, the emperor Alexander.

Most of his reign was dominated by co-regents: from 913 until 919 he was under the regency of his mother, while from 920 until 945 he shared the throne with Romanos Lekapenos, whose daughter Helena he married, and his sons. Constantine VII is best known for his four books, De Administrando Imperio, De Ceremoniis, De Thematibus, and Vita Basilii.

Constantine VII died at Constantinople in November 959 and was succeeded by his son Romanos II. It was rumored that Constantine had been poisoned by his son or his daughter-in-law Theophano.
Constantine VII
Emperor Constantine VII "the Purple-Born" of the Byzantine Empire

Epithet: Porphyrogennetos ("the Purple-Born")