Basil I (disambiguation)
Appearance
Basil I may refer to:
- Basil I the "Macedonian" (ca. 811–886), Byzantine emperor 867–886, founder of the Macedonian dynasty
- Patriarch Basil I of Constantinople, surnamed "Scamandrenus", patriarch 970–974
- Basil I of Russia (1371–1425), Grand Prince of Moscow and Vladimir 1389–1425