Constantine XI Palaiologos
After the fall of Constantinople, the use of two-headed eagle symbols spread to Grand Duchy of Moscow after Ivan III's second marriage (1472) to Zoe Palaiologina (a niece of the last Byzantine emperor Constantine XI Palaiologos, who reigned 1449–1453), The last prince of Tver, Mikhail III of Tver (1453–1505), was stamping his coins with two-headed eagle symbol. The double-headed eagle remained an important motif in the heraldry of the imperial families of Russia (the House of Romanov (1613-1762)).