The term "Komnenos" refers to a prominent Byzantine dynasty that ruled from the 11th to the 12th centuries. The dynasty is best known for its efforts to restore the power and prestige of the Byzantine Empire during a time of crisis, particularly following the Battle of Manzikert in 1071. Key figures include Alexios I Komnenos, who initiated military reforms and sought assistance from the West, leading to the First Crusade. The Komnenos dynasty is also notable for its cultural and intellectual contributions, fostering a revival in Byzantine art and literature. The period saw the construction of significant architectural works, such as the Hagia Sophia, and the promotion of Orthodox Christianity. The dynasty's influence waned after the Fourth Crusade in 1204, which led to the fragmentation of the empire.