380 – Edict of Thessalonica: Emperor Theodosius I and his co-emperors Gratian and Valentinian II, declare their wish that all Roman citizens convert to trinitarian Christianity.
425 – The University of Constantinople is founded by Emperor Theodosius II at the urging of his wife Aelia Eudocia.
907 – Abaoji, a Khitan chieftain, is enthroned as Emperor Taizu, establishing the Liao dynasty in northern China.
1560 – The Treaty of Berwick, which would expel the French from Scotland, is signed by England and the Lords of the Congregation of Scotland.
1594 – Henry IV is crowned King of France.
1617 – Sweden and Russia sign the Treaty of Stolbovo, ending the Ingrian War and shutting Russia out of the Baltic Sea.
1626 – Yuan Chonghuan is appointed Governor of Liaodong, after he led the Chinese into a great victory against the Manchurians under Nurhaci.
1700 - The island of New Britain is discovered.
1776 – American Revolutionary War: The Battle of Moore's Creek Bridge in North Carolina breaks up a Loyalist militia.
1782 – American Revolutionary War: The House of Commons of Great Britain votes against further war in America.
1801 – Pursuant to the District of Columbia Organic Act of 1801, Washington, D.C. is placed under the jurisdiction of the U.S. Congress.
1809 – Action of 27 February 1809: Captain Bernard Dubourdieu captures HMS Proserpine
1812 – Argentine War of Independence: Manuel Belgrano raises the Flag of Argentina in the city of Rosario for the first time.
1812 – Poet Lord Byron gives his first address as a member of the House of Lords, in defense of Luddite violence against Industrialism in his home county of Nottinghamshire.
1844 – The Dominican Republic gains independence from Haiti.
1860 – Abraham Lincoln makes a speech at Cooper Union in the city of New York that is largely responsible for his election to the Presidency.
1861 – Russian troops fire on a crowd in Warsaw protesting against Russian rule over Poland, killing five protesters.
1864 – American Civil War: The first Northern prisoners arrive at the Confederate prison at Andersonville, Georgia.
1870 – The current flag of Japan is first adopted as the national flag for Japanese merchant ships.
1881 – First Boer War: The Battle of Majuba Hill takes place.
1898 – King George I of Greece survives an assassination attempt.
1900 – Second Boer War: In South Africa, British military leaders receive an unconditional notice of surrender from Boer General Piet Cronjé at the Battle of Paardeberg.
1900 – The British Labour Party is founded.
1900 – Fußball-Club Bayern München is founded.
1902 – Second Boer War: Australian soldiers Harry "Breaker" Morant and Peter Handcock are executed in Pretoria after being convicted of war crimes.
1921 – The International Working Union of Socialist Parties is founded in Vienna.
1922 – A challenge to the Nineteenth Amendment to the United States Constitution, allowing women the right to vote, is rebuffed by the Supreme Court of the United States in Leser v. Garnett.
1933 – Reichstag fire: Germany's parliament building in Berlin, the Reichstag, is set on fire; Marinus van der Lubbe, a young Dutch Communist claims responsibility. The Nazis used the fire to solidify their power and eliminate the communists as political rivals.
1939 – United States labor law: The U.S. Supreme Court rules that sit-down strikes violate property owners' rights and are therefore illegal.
1940 – Martin Kamen and Sam Ruben discover carbon-14.
1942 – World War II: During the Battle of the Java Sea, an Allied strike force is defeated by a Japanese task force in the Java Sea in the Dutch East Indies.
1943 – The Smith Mine #3 in Bearcreek, Montana, explodes, killing 74 men.
1943 – In Berlin, the Gestapo arrest 1,800 Jewish men with German wives, leading to the Rosenstrasse protest.
1951 – The Twenty-second Amendment to the United States Constitution, limiting Presidents to two terms, is ratified.
1961 – The first congress of the Spanish Trade Union Organisation is inaugurated.
1962 – Two dissident Republic of Vietnam Air Force pilots bomb the Independence Palace in Saigon in a failed attempt to assassinate South Vietnam President Ngô Đình Diệm.
1963 – The Dominican Republic receives its first democratically elected president, Juan Bosch, since the end of the dictatorship led by Rafael Trujillo.
1964 – The Government of Italy asks for help to keep the Leaning Tower of Pisa from toppling over.
1971 – Doctors in the first Dutch abortion clinic (the Mildredhuis in Arnhem) start performing aborti provocati.
1976 – The formerly Spanish territory of Western Sahara, under the auspices of the Polisario Front declares independence as the Sahrawi Arab Democratic Republic.
1988 – Sumgait pogrom: The Armenian community in Sumgait, Azerbaijan is targeted in a violent pogrom.
1991 – Gulf War: U.S. President George H. W. Bush announces that "Kuwait is liberated".
2002 – Ryanair Flight 296 catches fire at London Stansted Airport. Subsequent investigations criticize Ryanair's handling of the evacuation.
2002 – Godhra train burning: A Muslim mob torches a train returning from Ayodhya, killing 59 Hindu pilgrims.
2004 – A bombing of a Superferry by Abu Sayyaf in the Philippines' worst terrorist attack kills 116.
2004 – Shoko Asahara, the leader of the Japanese doomsday cult Aum Shinrikyo, is sentenced to death for masterminding the 1995 Tokyo subway sarin attack
2007 – The Chinese Correction: The Shanghai Stock Exchange falls 9%, the largest drop in ten years.
2010 – An earthquake measuring 8.8 on the moment magnitude scale strikes central parts of Chile leaving over 500 victims, and thousands injured. The quake triggered a tsunami which struck Hawaii shortly after.
2013 – Five people (including the perpetrator) are killed and five others injured in a shooting at a factory in Menznau, Switzerland.
2015 – Assassination of Boris Nemtsov occurs.