The following events took place on April 21. The list is arranged in chronological order.
Found 43 events. Showing 1 - 30.
- 753 BCRomulus founds Rome (traditional date).
- 43 BCBattle of Mutina: Mark Antony is again defeated in battle by Aulus Hirtius, who is killed. Antony fails to capture Mutina and Decimus Brutus is murdered shortly after.
- 900The Laguna Copperplate Inscription (the earliest known written document found in what is now the Philippines): the Commander-in-Chief of the Kingdom of Tondo, as represented by the Honourable Jayadewa, Lord Minister of Pailah, pardons from all debt the Honourable Namwaran and his relations.
- 1092The Diocese of Pisa is elevated to the rank of metropolitan archdiocese by Pope Urban II
- 1506The three-day Lisbon Massacre comes to an end with the slaughter of over 1,900 suspected Jews by Portuguese Catholics.
- 1509Henry VIII ascends the throne of England on the death of his father, Henry VII.
- 1526The last ruler of the Lodi dynasty, Ibrahim Lodi is defeated and killed by Babur in the First Battle of Panipat.
- 1615The Wignacourt Aqueduct is inaugurated in Malta.
- 1782The city of Rattanakosin, now known internationally as Bangkok, is founded on the eastern bank of the Chao Phraya River by King Buddha Yodfa Chulaloke.
- 1792Tiradentes, a revolutionary leading a movement for Brazil’s independence, is hanged, drawn and quartered.
- 1806Action of 21 April 1806: A French frigate escapes British forces off the coast of South Africa.
- 1809Two Austrian army corps are driven from Landshut by a First French Empire army led by Napoleon as two French corps to the north hold off the main Austrian army on the first day of the Battle of Eckmühl.
- 1821Benderli Ali Pasha arrives in Constantinople as the new Grand Vizier of the Ottoman Empire; he remains in power for only nine days before being sent into exile.
- 1836Texas Revolution: The Battle of San Jacinto: Republic of Texas forces under Sam Houston defeat troops under Mexican General Antonio López de Santa Anna.
- 1856Australian labour movement: Stonemasons and building workers on building sites around Melbourne march from the University of Melbourne to Parliament House to achieve an eight-hour day.
- 1863Bahá'u'lláh, the founder of the Bahá'í Faith, declares his mission as “He whom God shall make manifest”.
- 1894Norway formally adopts the Krag–Jørgensen bolt-action rifle as the main arm of its armed forces, a weapon that would remain in service for almost 50 years.
- 1898Spanish–American War: The United States Navy begins a blockade of Cuban ports. When the U.S. Congress issued a declaration of war on April 25, it declared that a state of war had existed from this date.
- 1914Ypiranga incident: A German arms shipment to Mexico is intercepted by the U.S. Navy near Veracruz.
- 1918World War I: German fighter ace Manfred von Richthofen, better known as “The Red Baron”, is shot down and killed over Vaux-sur-Somme in France.
- 1925The Manifesto of the Fascist Intellectuals is published in Il Mondo, establishing the political and ideological foundations of Italian Fascism.
- 1934The “Surgeon’s Photograph”, the most famous photo allegedly showing the Loch Ness Monster, is published in the Daily Mail (in 1999, it is revealed to be a hoax).
- 1941Emmanouil Tsouderos becomes the 132nd Prime Minister of Greece.
- 1945World War II: Soviet forces south of Berlin at Zossen attack the German High Command headquarters.
- 1952Secretary‘s Day (now Administrative Professionals’Day) is first celebrated.
- 1960Brasília, Brazil’s capital, is officially inaugurated. At 09:30, the Three Powers of the Republic are simultaneously transferred from the old capital, Rio de Janeiro.
- 1962The Seattle World’s Fair (Century 21 Exposition) opens. It is the first World’s Fair in the United States since World War II.
- 1963The Universal House of Justice of the Bahá'í Faith is elected for the first time.
- 1964A Transit-5bn satellite fails to reach orbit after launch; as it re-enters the atmosphere, 2.1 lb of radioactive plutonium in its SNAP RTG power source is widely dispersed.
- 1965The 1964–1965 New York World’s Fair opens for its second and final season.
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