By Day: Historical Events on February 21st

Pope Gregory XI moves the Papal See back to Rome from Avignon, ending the Avignon Papacy.

Rebellion of Owain Glyndŵr: Welsh forces under Owain Glyndŵr revolt against English rule in Wales.

The trial of Joan of Arc begins in Rouen, France, led by a pro-English ecclesiastical court.

Henry VIII becomes King of England following the death of his father, Henry VII.

The Zemsky Sobor elects Michael Romanov, the 16-year-old son of Patriarch Filaret of Moscow, tsar of Russia. He was was crowned on 21 July becoming the founder of the Romanov dynasty, which ruled Russia until 1917. More

The Confederation Congress convenes to put the United States' newly written Constitution into effect.

Karl Marx and Friedrich Engels publish "The Communist Manifesto." More

The Washington monument is formally dedicated one day before George Washington's birthday (which fell on a Sunday that year).. More

Malcolm X is assassinated in New York City. More