1427

January–December

• January - Spring - Radu II of Wallachia resumes the throne for the fourth time, but a seven-year struggle for it ends when he is defeated in battle, and probably killed, by Dan II, who resumes the throne for a fifth term.
• April - The House of Balsic's rule of Montenegro comes to an end with the death of Balša III.
• August 4 - Hussite Wars: Battle of Tachov - The Hussites decisively beat the crusader armies, ending the Fourth Anti-Hussite Crusade.
• August 17 - The first band of Gypsies visits Paris, according to an account of the citizens of Paris.
• October 13 - Lincoln College, a constituent college of the University of Oxford in England, is founded by the Bishop of Lincoln.

  Date unknown

• Gabriel V is elected Patriarch of the Coptic Church for the second time.
• Minrekyansa becomes King of Ava.
• The Conflict of Druimnacour occurs in Sutherland, Scotland.
• The first witch hunts begin, in Switzerland.
• The Celestine Order is established in France.
• The Celebration of Sant Jordi begins in Catalonia.
• Bremen is expelled from the Hanseatic League.
• Diogo de Silves, Portuguese navigator, discovers seven islands of the Azores archipelago.
• Battle of the Echinades: A Byzantine fleet defeats the fleet of Carlo I Tocco.
• Itzcoatl becomes the 4th Tlatoani of Tenochtitlan, after his nephew Chimalpopoca is killed by the Maxtla, at Azcapotzalco.
• Bhaktapur Royal Palace is built by King Yaksa Malla.

  Births

• February 27 - Ruprecht, Archbishop of Cologne
• May 8 - John Tiptoft, 1st Earl of Worcester, Lord High Treasurer
• May 29 - Françoise d'Amboise, duchess consort of Brittany, co-founder of the first monastery of the Carmelites in France
• June 22 - Lucrezia Tornabuoni, Italian writer, adviser and spouse of Piero di Cosimo de' Medici
• September 9 - Thomas de Ros, 9th Baron de Ros, English politician
• October 26 - Archduke Sigismund of Austria
• November 24 - John Stafford, 1st Earl of Wiltshire
• November 29 - Zhengtong Emperor of China
• November 30 - Casimir IV Jagiellon, King of Poland
• date unknown - Shen Zhou, Chinese painter

  Deaths

• April 17 - John IV, Duke of Brabant
• May 7 - Thomas la Warr, 5th Baron De La Warr, English churchman
• May 28 - Henry IV, Count of Holstein-Rendsburg
• July 19 - Stefan Lazarević, Despot of Serbia
• date unknown
• * Chimalpopoca, Aztec Tlatoani of Tenochtitlán
• * Qu You, Chinese novelist
• probable
• * Jehuda Cresques, Catalan cartographer
• * Gentile da Fabriano, Italian painter
• * Radu II Prasnaglava, ruler of Wallachia, probably killed in or after a lost battle