Khan Krum was a notable ruler of the First Bulgarian Empire, reigning from around 803 to 814 AD. He is best known for his military conquests and efforts to expand the territory of Bulgaria. Under his leadership, the empire grew significantly, and he successfully defeated the Byzantine Empire in several battles, solidifying Bulgaria's power in the region. Khan Krum is also recognized for his legal reforms and administrative organization. He introduced a code of laws that helped govern the diverse populations within his empire. His legacy includes the establishment of a strong Bulgarian state, which would influence the Balkans for centuries to come.