Having been pardoned by Eudokia Makrembolitissa, the regent of the Byzantine Empire, for attempting to usurp the throne, Romanos IV Diogenes married her to become Byzantine emperor. Eudokia Makrembolitissa: Eudokia Makrembolitissa was a Byzantine empress by her successive marriages to Constantine X Doukas and Romanos IV Diogenes. She acted as ruler with her two sons in 1067, and resigned her rule by marriage to Romanos IV Diogenes. When he was deposed in 1071 she resumed the rule with her son Michael VII, but was soon forced to resign again. January 1, 1068. Wiki link