Constantine Doukas (co-emperor) Doukid dynasty Born: 1074 Died: 1095 Regnal titles Preceded by Michael VII Doukas Byzantine Co-emperor 1074–1078 with Michael VII Doukas 1071–1078 Succeeded by Nikephoros III Preceded by Nikephoros III Byzantine Co-emperor 1081–1088 with Alexios I Komnenos 1081–1118 Succeeded by Alexios I Komnenos