The Comnenian Dynasty was a ruling family of the Byzantine Empire that reigned from 1081 to 1185. Founded by Alexios I Comnenus, the dynasty is known for its efforts to restore the empire's power and stability during a time of crisis, including the First Crusade. Under the Comnenians, the Byzantine Empire experienced military and economic revival. Notable emperors included John II Comnenus and Manuel I Comnenus, who expanded the empire's territories and strengthened its administration. The dynasty ultimately fell due to internal strife and external pressures, leading to the decline of Byzantine influence in the region.