Grand Duke Ivan IV of Muscovy becomes the first Tsar of Russia, replacing the 264-year-old Grand Duchy of Moscow with the Tsardom of Russia.

Ivan IV Vasilyevich, commonly known as Ivan the Terrible, was Grand Prince of Moscow and all Russia from 1533 to 1547, and the first Tsar and Grand Prince of all Russia from 1547 until his death in 1584. Ivan's reign was characterised by Russia's transformation from a medieval state to a fledgling empire, but at an immense cost to its people and long-term economy.

The Grand Principality of Moscow, or Muscovy, known as the Principality of Moscow until 1389, was a late medieval Russian monarchy. Its capital was the city of Moscow. Originally established as a minor principality in the 13th century, the grand principality was transformed into a centralized Russian state in the late 15th century.

The Tsar of all Russia, formally the Sovereign, Tsar and Grand Prince of all Russia, was the title of the Russian monarch from 1547 to 1721. During this period, the state was a tsardom.

The Tsardom of Russia, also known as the Tsardom of Moscow, was the centralized Russian state from the assumption of the title of tsar by Ivan IV in 1547 until the foundation of the Russian Empire by Peter the Great in 1721.

January 16 is the 16th day of the year in the Gregorian calendar; 349 days remain until the end of the year.