Basil I (Basil the Macedonian) (băz`əl, bā`zəl), c.813–886, Byzantine emperor (867–86). His ancestors probably were Armenians or Slavs who settled in Macedonia. He became (c.856) the favorite of Emperor Michael III Michael III (Michael the Amorian or Phrygian), 836–67, Byzantine emperor (842–67), son and successor of Theophilus and grandson of Michael II. His minority saw the final overthrow of iconoclasm and a severe persecution of the Paulicians .
..... Click the link for more information. . In 886, Basil, with the aid of Michael, assassinated Michael's uncle and chief minister, Bardas, and was made coemperor. Michael's feeling toward Basil began to change and in 867 Basil had him murdered and had himself proclaimed emperor. Thus the Macedonian dynasty of the East, which lasted until 1056, was founded. A capable ruler, Basil reformed the finances; modernized the law of Justinian I by introducing a new code, the Basilica; protected the poorer classes; and restored the military prestige of the empire. Byzantine art and architecture entered their second golden age during his rule. A major event of his reign was the dissension between the Roman and the Eastern churches. In order to prevent an open break, Basil restored (867) to the patriarchate Ignatius of Constantinople Ignatius of Constantinople, Saint, c.800–877, Greek churchman, patriarch of Constantinople. A son of Byzantine Emperor Michael I, he was castrated and shut up in a monastery (813) by the man who deposed his father, Emperor Leo V, to prevent his succession to
..... Click the link for more information. , who had been deposed in favor of Photius Photius (fō`shəs), c.820–892?, Greek churchman and theologian, patriarch of Constantinople, b. Constantinople.
..... Click the link for more information. . On Ignatius' death, Basil reinstated (877) Photius, causing strained relations but not a full break with Rome. Basil in 865 had divorced his wife and married the mistress of Michael III. He was succeeded by his son Leo VI.

Basil I

known as Basil the Macedonian

(born 826/835, Thrace—died Aug. 29, 886) Byzantine emperor (867–86) and founder of the Macedonian dynasty. Born into a peasant family in Macedonia, he won employment in official circles in Constantinople and was made chamberlain by the reigning emperor, Michael III. He became coemperor with Michael in 866 and murdered him the next year. Basil won victories against Muslim forces along the eastern borders of Asia Minor and asserted control over Slavs in the Balkans. He gained ground in southern Italy but lost Syracuse (878) and other key cities in Sicily to the Muslims. He also formulated the Greek legal code known as the Basilica. In later life Basil showed signs of madness.