Anna Porphyrogenita was a Byzantine princess born in Constantinople in 963, who later became the grand princess consort of Kyiv. As the daughter of Emperor Romanos II and sister to Emperors Basil II and Constantine VIII, her status as a legitimate imperial daughter was highly prestigious. Her marriage to Grand Prince Vladimir the Great played a significant role in the Christianization of the Rus' realm, as Vladimir converted to Eastern Christianity partly due to the influence of her religious traditions and the union itself.