IVAN THE TERRIBLE Ivan IV (born 1530, ruled 1533-1584) is better known as Ivan the Terrible (his Russian epithet, groznyy, means threatening or dreaded). He became the leader of Russia when he was 3 and was crowned the “Tsar of all Russians” in 1547 with a sable-trimmed Byzantine-style crown.
http://factsanddetails.com/russia/History/sub9_1b/entry-4935.html

