Ivan IV son of Vasily; an absolute ruler; called Ivan the Terrible, came to throne in 1533 when he was only three years old; the boyars fought to control him when he was young; when he was 16, he seized power and had himself crowned czar - this title meant "caesar", and he was the first Russian ruler to use it officially; he married the beautiful Anastasia, related to an old boyar family, the Romanovs; his "good period" was the years from 1547 to 1560 - he won great victories, added lands to Russia, gave Russia a code of laws, and ruled justly; his "bad period" began in 1560 after Anastasia died - accusing the boyars of poisoning his wife, he turned against them by using his secret police to execute many of them, their families and the peasants who worked their lands - thousands of people died; he seized their estates and gave them to a new class of nobles, who had to remain loyal to him or lose their land; in 1581, during a violent quarrel, he killed his oldest son and heir; when Ivan died three years later, only his weak second son was left to rul
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