Alexios I Komnenos was a Byzantine Emperor who ruled from 1081 to 1118. He is known for his efforts to stabilize the Byzantine Empire during a time of crisis, facing threats from both the Seljuk Turks and the Normans. His reign marked the beginning of the Komnenian dynasty, which brought significant military and administrative reforms. Alexios I is also notable for initiating the First Crusade by appealing to Western Europe for help against the Muslim forces. His diplomatic skills and military strategies helped to reclaim lost territories and strengthen the empire, leaving a lasting impact on Byzantine history.