Theophano (Greek: Θεοφανώ, Theophanō) was a Byzantine empress consort and regent. She was the daughter-in-law of Constantine VII, wife of Romanos II and Nikephoros II Phokas, lover of John I Tzimiskes, the mother of Basil II, Constantine VIII and Anna Porphyrogenita. Theophano played an important role in 10th century Byzantine history. She served as regent during the minority of her sons.
Theophano was born of Laconian Greek origin in the Peloponnesian region of Lakonia, possibly in the city of Sparta, in 941. Theophano was originally named Anastasia, or more familiarly Anastaso and was the daughter of a poor tavern-keeper called Craterus. Theophano was renowned for her great beauty and heir apparent Romanos fell in love with her around the year 956 and married her over the strenuous objections of his father. After their marriage, she was renamed Theophano, after Theophano, a sainted Empress of the Macedonian dynasty.
Theophano's humble origins made her unpopular among Byzantine elites and when her father-in-law, the emperor Constantine VII died, rumors were spread alleging that she had poisoned him. Constantine died in 959, but he died of a fever which lasted several months, not showing evidence of poisoning. Astute and intelligent, Theophano had influence with her husband, Romanos, an influence resented and likely exaggerated by her rivals in the court.
On March 15, 963, Emperor Romanos II died unexpectedly at the age of twenty-six. Again, Theophano was rumored to have poisoned him, although she had nothing to gain and everything to lose from this action and, indeed, was still in bed only 48 hours after giving birth to Anna Porphyrogenita when the Emperor died. Their sons Basil II and Constantine VIII, only five and three years old, respectively, were the heirs and Theophano was named regent. However, hereditary ascension was a matter of tradition, not law in the Empire and she realized that to protect her sons and secure her position she would need a protector. Passing over a bevy of would be suitors among Constantinople's courtiers, she made an alliance with Nikephoros Phokas. Nikephoros, a physically repulsive ascetic twice her age, was the greatest military hero of the Empire at the time, having reconquered Crete, Cyprus, Cilicia, and Aleppo. In return for her hand, the childless Nikephoros gave his sacred pledge to protect her children and their interests. As the army had already proclaimed Nikephoros an Emperor in Caesarea, Nikephoros entered Constantinople on August 14, broke the resistance of Joseph Bringas (a eunuch palace official who had become Romanos' chief counsellor) in bloody street fighting. On the 16th of August in the Hagia Sophia, he was crowned Emperor and followed soon after in the marriage of Theophano, bolstering his legitimacy.