Constantine VIII Porphyrogenitus (, Kōnstantinos Porphyrogénnetos; 960 – 11/12 November 1028) was de jure Byzantine emperor from 962 until his death. He was the younger son of Emperor Romanos II and Empress Theophano. He was nominal co-emperor since 962, successively with his father; stepfather, Nikephoros II Phokas; uncle, John I Tzimiskes; and brother, Basil II. Basil's death in 1025 left Constantine as the sole emperor. He occupied the throne for 66 years in total, making him de jure the longest-reigning amongst all Roman emperors since Augustus. Constantine displayed a lifelong lack of interest in politics, statecraft and the military, and during his brief sole reign the government of the Byzantine Empire suffered from mismanagement and neglect. He had no sons and was instead succeeded by Romanos Argyros, husband of his daughter Zoë. Family Constantine's father, Romanos II, was the sixth Byzantine emperor of the Macedonian dynasty. After the death of his first wife, Bertha (who took the name Eudocia), daughter of Hugh of Arles, he fell in love with and married an innkeeper's daughter from the Peloponnese, Theophano. Contemporaries called Theophano the most beautiful woman in Christendom as well as ambitious, an inveterate schemer and utterly amoral. She bore Romanos four children, including Constantine, born in 960, and his elder brother Basil, born in 958. His sister Anna's hand was considered such a prize that Vladimir I of Kiev converted to Christianity to marry her. Aged eight, Constantine was engaged to a daughter of Emperor Boris II of Bulgaria but in the end, he married a Byzantine aristocrat, Helena, daughter of Alypius. By Helena he had three daughters: Eudokia, who became a nun; Zoë, who was empress for 22 years; and Theodora, who reigned for 18 months and was the last of the Macedonian line. Life Childhood Romanos died suddenly in 963. Although Constantine was only three years old, he had already been crowned co-emperor in the preceding year, probably on 30 March. The widowed Theophano installed herself as regent for her sons and stocked the imperial government with supporters, but she faced competition for power with Joseph Bringas, a former advisor of Romanos. Theophano allied with Nikephoros Phokas, a celebrated general and opponent of Bringas. In return for her hand, the childless Nikephoros gave his sacred pledge to protect her children and their interests. Three months after Romanos' death, supporters of Nikephoros ousted Bringas from power. Nikephoros was crowned