Manuel 's death on 24 September 1180 left his 11-year-old son Alexios II Komnenos on the throne . Alexios was highly incompetent in the office , and with his mother Maria of Antioch 's Frankish background , made his regency unpopular . Eventually , Andronikos I Komnenos , a grandson of Alexios I , launched a revolt against his younger relative and managed to overthrow him in a violent '' coup d'état '' . Utilizing his good looks and his immense popularity with the army , he marched on to Constantinople in August 1182 and incited a massacre of the Latins . After eliminating his potential rivals , he had himself crowned as co-emperor in September 1183 . He eliminated Alexios II , and took his 12-year-old wife Agnes of France for himself
and incited a massacre of the Latins
Massacre of the Latins
Byzantine Empire