Events on April 23 37
Year 599
Maya king Uneh Chan of Calakmul attacks rival city-state Palenque in southern Mexico, defeating queen Yohl Ik'nal and sacking the city.
Year 1014
Battle of Clontarf: High King of Ireland Brian Boru defeats Viking invaders, but is killed in battle.
Year 1348
The founding of the Order of the Garter by King Edward III is announced on St. George's Day.
Year 1516
The Bayerische Reinheitsgebot (regarding the ingredients of beer) is signed in Ingolstadt.
Year 1635
The first public school in the United States, Boston Latin School, is founded in Boston.
Year 1655
The Siege of Santo Domingo begins during the Anglo-Spanish War, and fails seven days later.
Year 1661
King Charles II of England, Scotland and Ireland is crowned in Westminster Abbey.
Year 1815
The Second Serbian Uprising: A second phase of the national revolution of the Serbs against the Ottoman Empire, erupts shortly after the annexation of the country to the Ottoman Empire.
Year 1879
Fire burns down the second main building and dome of the University of Notre Dame, which prompts the construction of the third, and current, Main Building with its golden dome.
Year 1918
World War I: The British Royal Navy makes a raid in an attempt to neutralise the Belgian port of Bruges-Zeebrugge.
Year 1920
The Grand National Assembly of Turkey (TBMM) is founded in Ankara. The assembly denounces the government of Sultan Mehmed VI and announces the preparation of a temporary constitution.
Year 1927
Cardiff City defeat Arsenal in the FA Cup Final, the only time it has been won by a team not based in England.
Year 1941
World War II: The Greek government and King George II evacuate Athens before the invading Wehrmacht.
Year 1942
World War II: Baedeker Blitz - German bombers hit Exeter, Bath and York in retaliation for the British raid on Lübeck.
Year 1945
World War II: Adolf Hitler's designated successor Hermann Göring sends him a telegram asking permission to take leadership of the Third Reich, which causes Hitler to replace him with Joseph Goebbels and Karl Dönitz.
Year 1946
Manuel Roxas is elected the last President of the Commonwealth of the Philippines.
Year 1951
American journalist William N. Oatis is arrested for espionage by the Communist government of Czechoslovakia.
Year 1967
Soviet space program: Soyuz 1 (Russian: Союз 1, Union 1) a manned spaceflight carrying cosmonaut Colonel Vladimir Komarov is launched into orbit.
Year 1968
Vietnam War: Student protesters at Columbia University in New York City take over administration buildings and shut down the university.
Year 1971
Bangladesh Liberation War: The Pakistan Army and Razakars massacre approximately 3,000 Hindu emigrants in the Jathibhanga area of East Pakistan (now Bangladesh).
Year 1985
Coca-Cola changes its formula and releases New Coke. The response is overwhelmingly negative, and the original formula is back on the market in less than three months.
Year 1990
Namibia becomes the 160th member of the United Nations and the 50th member of the Commonwealth of Nations.
Year 1993
Eritreans vote overwhelmingly for independence from Ethiopia in a United Nations-monitored referendum.
Year 1993
Sri Lankan politician Lalith Athulathmudali is assassinated while addressing a gathering, approximately four weeks ahead of the Provincial Council elections for the Western Province.
Year 2005
The first ever YouTube video, titled "Me at the zoo", was published by user "jawed".[1]
Year 2013
At least 28 people are killed and more than 70 are injured as violence breaks out in Hawija, Iraq.
Year ?
A temple is built on the Capitoline Hill dedicated to Venus Erycina to commemorate the Roman defeat at Lake Trasimene.