Grand Princess of Moscow. Born Zoe Palaiologina before changing her name to Sophia Palaiologina to Thomas Palaiologos the brother of the last Byzantine Emperor, Constantine XI Palaiologos and her mother Catherine the only legitimate daughter and heiress of Centurione II Zaccaria. She married Ivan III in 1472 after her husbands death in 1505 her son Vasili lll became czar. Her grandson Ivan the Terrible became Czar in 1533. She died in 1503 two years before her husband.