Alexios I Komnenos was a Byzantine Emperor who reigned from 1081 to 1118. He is known for his role in the early Crusades and for initiating significant military and financial reforms within the Byzantine Empire, which helped to stabilize and strengthen the empire during a tumultuous period. His reign marked a critical moment in Byzantine history, as he sought both to defend his territory against external threats and to engage with the Western powers through diplomacy.