Constantine VIII
Theodora was the third and youngest daughter of the Byzantine Emperor Constantine VIII and Helena, daughter of Alypius. She was "Porphyrogenita", "born into the purple"; the appellation for a child born in the capital to a reigning emperor. Her father became co-emperor in 962 and sole emperor upon the death of his brother Basil II in 1025. His reign as sole emperor lasted less than three years, from 15 December 1025 to 15 November 1028.