April 21

• April 21, 753 BC
  Rome is founded on the Palatine Hill by representatives of Latins, an Italic tribe inhabiting central Italy, according with the Roman annalists
• April 21, 1477
  Maximilian of Habsburg marries Maria of Burgundy, heiress of all the Netherlands
• April 21, 1526
  King of Kabul Babur with an Islamic forces annihilates Indian Army of sultan of Delhi Ibrahim Lodi at the Battle of Panipat, starting the Mughal dynasty at Delhi
• April 21, 1649
  The Maryland Toleration Act, which provides for freedom of worship for all Christians, is passed by the Maryland assembly
• April 21, 1792
  Joaquim Jose da Silva Xavier also known as Tiradentes, is drawn and quartered by the Portuguese in Rio de Janeiro and pieces of his body are exposed in the cities between Vila Rica and Rio, in an attempt to scare the people who have listened to his independence ideas
• April 21, 1836
  Texian Army defeat and capture Mexican general Antonio Lopez de Santa Anna at the 18 minutes-long Battle of San Jacinto, which leads to end of the Texas Revolution and independence of Republic of Texas from Mexico
• April 21, 1863
  Baha'u'llah declares his station as "He whom God shall make manifest" in Iran, marking the foundation of the Bahai faith, which reflectes the attitudes of the Shiah sect with an emphasis on tolerance
• April 21, 1864
  Max Weber, German sociologist and political economist, who drew strong connection between Protestantism and the rise of capitalism, is born
• April 21, 1914
  United States marines occupy Vera Cruz, Mexico and stay six months in an effort to try to preserve trade
• April 21, 1918
  Manfred von Richthofen, a German fighter pilot considered the top ace of the World War I, also known as Red Baron, is shot down and killed near Amiens
• April 21, 1945
  About 320,000 German troops in Army Group B surrender to Allies in the Ruhr
• April 21, 1952
  British Overseas Airways Corporation begins First scheduled flight by commercial jet, London-Rome route
• April 21, 1960
  Brasilia becomes the capital of Brazil
• April 21, 1967
  Konstantinos Kollias becomes premier after military coup in Greece
• April 21, 1992
  The death of Grand Duke Vladimir Cyrillovich of Russia results in a succession dispute between Nicholas Romanov, Prince of Russia and Vladimir's daughter Maria for the leadership of the Imperial Family of Russia
• April 21, 1994
  The Red Cross estimates that hundreds of thousands of Tutsi have been killed in Rwanda
• April 21, 2009
  UNESCO launches The World Digital Library, an international digital library