Who was Emperor Basil I and what were his major accomplishments?

Emperor Basil I, also known as Basil the Macedonian, was the founder of the Macedonian dynasty in the Byzantine Empire. He ruled from 867 until his death in 886, and is known for his military campaigns, administrative reforms, and patronage of the arts.

Basil's reign was marked by his successful military campaigns against the Bulgars and the Arabs. He also reformed the administration of the empire, strengthening the position of the emperor and creating a new class of aristocrats who were loyal to the throne. In addition, he encouraged the growth of the arts, and patronized scholars, writers, and artists.

Basil's most significant achievement was the consolidation of the Byzantine Empire's power and territory. He stabilized the empire's finances, reformed the army, and created a strong central government that was able to withstand the challenges posed by its enemies.