1404

Year 1404 was a leap year starting on Tuesday (link will display the full calendar) of the Julian calendar.

Events of 1404

* June 14 - Rebel leader Owain Glyndŵr, having declared himself Prince of Wales, allies with the French against the English. He later begins holding parliamentary assemblies.
* October 17 - Pope Innocent VII succeeds Pope Boniface IX as the 204th pope.
* November 19 - St. Elizabeth's flood devastates parts of Flanders, Zeeland and Holland.
* Stefan Tvrtko II succeeds Stefan Ostoja as King of Bosnia.
* Peace is declared between Lithuania and the Teutonic Knights after they agree to exchange land and form an alliance against Muscovy.
* The University of Turin is founded.
* Timur is hit by a fever while preparing to invade China.
* Centurione II Zaccaria succeeds Maria II Zaccaria as ruler of the Principality of Achaea.
* Virupaksha Raya succeeds Harihara Raya II as ruler of the Vijayanagara Empire in present-day southern India.
* Narayana Ramadhipati succeeds Ponthea Yat as King of Cambodia.
* Ruaidri Caech MacDermot succeeds Conchobair Og MacDermot as King of Moylurg in present-day north-east Connacht, Ireland.
* The city of Vicenza comes under the rule of the Venetians.

Births

* February 9 - Constantine XI, last Byzantine Emperor (d. 1453)
* February 14 - Leone Battista Alberti, Italian painter, poet, and philosopher (d. 1472)
* March 25 - (baptism) - John Beaufort, 1st Duke of Somerset, English military leader (d. 1444)
* June - Murad II, Ottoman Sultan (d. 1451)
* July 25 - Philip I, Duke of Brabant (d. 1430)
* September 10 - Gilles de Rais, French aristocrat (d. 1440)
* October 14 - Marie of Anjou, queen of Charles VII of France (d. 1463)
*"date unknown"
**Yamana Sōzen, Japanese warlord and monk (d. 1473)

Deaths

* April 27 - Philip II, Duke of Burgundy (b. 1342)
* September 14 - Duke Albert IV of Austria (b. 1377)
* September 27 - William of Wykeham, English bishop and statesman (b. 1320)
* October 1 - Pope Boniface IX (b. 1356)
* October 15 - Marie Valois, French princess (b. 1344)
* December 13 - Albert, Count of Holland (b. 1336)
*"date unknown" - Eleanor of Arborea, ruler of Sardinia (b. 1350)