Ivan III, known as Ivan the Great, (born Jan. 22, 1440, Moscow—died Oct. 27, 1505, Moscow), Grand prince of Moscow (1462–1505). Determined to enlarge the territory he inherited from his father, Ivan led successful military campaigns against the Tatars in the south (1458) and east (1467–69). He subdued Novgorod (1478) and gained control of most of the remainder of Great Russia by 1485. He also renounced Moscow’s subjection to the khan of the Golden Horde (1480) and won a final victory over the khan’s sons in 1502. Stripping the boyars of much of their authority, he laid the administrative foundations of a centralized Russian state. Ivan IV the Terrible was his grandson.
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