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 (ancient Burma).
• The Conflict of Druimnacour occurs in Sutherland, Scotland.^[1]
• The first witch hunts begin, in Switzerland.
• The Celestine Order is established in France.
• The Celebration of Sant Jordi (Saint George) begins in Catalonia (he will later become its patron saint).
• 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 (in Nepal) is built by King Yaksa Malla.

• February 27 – Ruprecht, Archbishop of Cologne (d. 1480)
• May 8 – John Tiptoft, 1st Earl of Worcester, Lord High Treasurer (d. 1470)
• May 29 – Françoise d'Amboise, duchess consort of Brittany, co-founder of the first monastery of the Carmelites in France (d. 1485)
• June 22 – Lucrezia Tornabuoni, Italian writer, adviser and spouse of Piero di Cosimo de' Medici (d. 1482)
• September 9 – Thomas de Ros, 9th Baron de Ros, English politician (d. 1464)
• October 26 – Archduke Sigismund of Austria (d. 1496)
• November 24 – John Stafford, 1st Earl of Wiltshire (d. 1473)
• November 29 – Zhengtong Emperor of China (d. 1464)
• November 30 – Casimir IV Jagiellon, King of Poland (d. 1492)
• date unknown – Shen Zhou, Chinese painter (d. 1509)

• April 17 – John IV, Duke of Brabant (b. 1403)^[2]
• May 7 – Thomas la Warr, 5th Baron De La Warr, English churchman
• May 28 – Henry IV, Count of Holstein-Rendsburg (b. 1397)
• July 19 – Stefan Lazarević, Despot of Serbia (b. 1377)^[3]
• date unknown
  • Chimalpopoca, Aztec Tlatoani (ruler) of Tenochtitlán (b. 1397)^[4]
  • Qu You, Chinese novelist (b. 1341)
• probable
  • Jehuda Cresques, Catalan cartographer (b. 1350)
  • Gentile da Fabriano, Italian painter
  • Radu II Prasnaglava, ruler of Wallachia, probably killed in or after a lost battle