1409Centuries: 14th century - 15th century - 16th century)
- January 1 - The Welsh surrender Harlech Castle to the English.
- March 25 - The Council of Pisa opens.
- Martin I of Aragon becomes King of Sicily
- Ulugh Beg becomes governor of Samarkand
- Venice buys the port of Zadar from Hungary
- January 16 - Rene I of Naples
- February 9 - Constantine XI, last Byzantine Emperor
- Charles VIII, King of Sweden