In 15th-century Russia, Byzantine princess Sophia Palaiologina weds Czar Ivan III. Overcoming intrigues, she aids Ivan in unifying Russia, expelling Mongol invaders, and constructing the ico... Read allIn 15th-century Russia, Byzantine princess Sophia Palaiologina weds Czar Ivan III. Overcoming intrigues, she aids Ivan in unifying Russia, expelling Mongol invaders, and constructing the iconic Kremlin.In 15th-century Russia, Byzantine princess Sophia Palaiologina weds Czar Ivan III. Overcoming intrigues, she aids Ivan in unifying Russia, expelling Mongol invaders, and constructing the iconic Kremlin.