Roman Era - Byzantine - 1143-1180 - Billion Aspron Trachy - Manuel I Komnenos ( 28 November 1118 – 24 September 1180) was a Byzantine emperor of the 12th century who reigned over a crucial turning point in the history of Byzantium and the Mediterranean. His reign saw the last flowering of the Komnenian restoration, during which the Byzantine Empire experienced a resurgence of military and economic power and enjoyed a cultural revival.