| Basil I | |
|---|---|
| Emperor of the Romans | |
 Underdrawing of Basil I in the Paris Gregory, c. 879–883[1] | |
| Byzantine emperor | |
| Reign | 24 September 867 – 29 August 886 |
| Coronation | 26 May 866 (as co-emperor) |
| Predecessor | Michael III |
| Successor | Leo VI |
| Co-emperor | Constantine (868–879) Leo VI (870–886) Alexander (879–886) |
| Born | late 811 Chariopolis, Macedonia, Byzantine Empire (now Hayrabolu, Tekirdağ, Turkey) |
| Died | 29 August 886 (aged 75) |
| Consort | Eudokia Ingerina |
| Wives |
|
| Issue Among others | Constantine Emperor Alexander Emperor Leo VI[a] Patriarch Stephen I[a] |
| Dynasty | Macedonian |
| Father | Bardas |
| Mother | Pankalo |
| Religion | Chalcedonian Christianity |
Basil I, nicknamed "the Macedonian" (Greek: Βασίλειος ὁ Μακεδών, translit. Basíleios ō Makedṓn; 811 – 29 August 886), was Byzantine emperor from 867 to 886. Born to a peasant family in Macedonia, he rose to prominence in the imperial court after gaining the favour of Emperor Michael III, whose mistress he married on his emperor's orders. In 866, Michael proclaimed him co-emperor. Fearing a loss of influence, Basil orchestrated Michael's assassination the next year and installed himself as sole ruler of the empire. He was the first ruler of the Macedonian dynasty.
Despite his humble origins, Basil was an effective and respected monarch. He initiated a complete overhaul of Byzantine law, an effort continued by his successor and ultimately became the Basilika. On the foreign front, he achieved military success against the heretical Paulicians, whom he subjugated in 872. He also pursued an active policy in the west, allying with Carolingian emperor Louis II against the Arabs, which led to a new period of Byzantine domination in Italy. On his death in a hunting accident in 886, he was succeeded by his son Leo VI, also rumoured to have been the son of Michael III.
- ^ Brubaker 1999, pp. 6, 152–162.
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