Ivan III ("the Great") finally threw off the control of the Golden Horde and consolidated the whole of Central and Northern Rus' under Moscow's dominion, and was the first Russian ruler to take the title title "Grand Duke of all Rus'". After the fall of Constantinople in 1453, Moscow claimed succession to the legacy of the Eastern Roman Empire. Ivan III married Sophia Palaiologina, the niece of the last Byzantine Emperor Constantine XI, and made the Byzantine double-headed eagle his own, and eventually Russia's, coat-of-arms.