When Ivan III died in 1505, Vasily III continued his conquest of unifying the nation and In the 1500s, Vastly conquered Pskov and Ryazan. By the end of the 14th century, he subjugated three other territories (Mari, Yurga and Komi) and conquered the Pechora and Karelians at the end of the 15th century. Vasily III died in 1533 and Ivan IV, also known as Ivan the Terrible, took control. At the age of 17, Ivan IV was crowned czar of all Russia. He established rule over the middle and lower Volga area after killing Tatar khanates of Kazan in 1552 and Astrakhan in 1556.
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