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