Ivan IV Vasilyevich, commonly known as Ivan the Terrible, was the Grand Prince of Moscow from 1533 to 1547 and Tsar of All the Russias from 1547 until his death. His long reign saw the conquest of the Khanates of Kazan, Astrakhan, and Siberia, transforming Russia into a multiethnic and multiconfessional state spanning almost one billion acres, approximately 4,046,856 km². Ivan managed countless changes in the progression from a medieval state to an empire and emerging regional power, and became...
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