Several Czars were powerful figures in Russian history. They were appointed by the Tsar and held a variety of roles, including military, economic, and political. The most famous Czar was Ivan IV, also known as Ivan the Terrible, who reigned from 1533 to 1584. He was the first to be crowned Tsar of All Russia and is remembered for his ruthless rule. Other Czars included Peter the Great, Catherine the Great, and Nicholas II.