What Happened in 1231
- W 1
- T 2
- F 3
- S 4
- S 5
- M 6
- T 7
- W 8
- T 9
- F 10
- S 11
- S 12
- M 13
- T 14
- W 15
- T 16
- F 17
- S 18
- S 19
- M 20
- T 21
- W 22
- T 23
- F 24
- S 25
- S 26
- M 27
- T 28
- W 29
- T 30
- Jun 11 Harderwijk (Netherlands) becomes a city
- Mar 17 Emperor Shijō of Japan (d. 1242)
- Jun 12 Antony of Padua [Fernando M de Bulhom], Portuguese friar and saint (patron saint of Portugal), dies at about 35
- Jun 13 Anthony of Padua, Portuguese saint, dies at 35
- Sep 15 Louis I, Duke of Wittelsbach, dies
- Nov 6 Emperor Tsuchimikado of Japan (1198-1210) (b. 1196)
- Nov 17 Elisabeth of Hungary, daughter of Andrew II of Hungary (b. 1207)
- W 1
- T 2
- F 3
- S 4
- S 5
- M 6
- T 7
- W 8
- T 9
- F 10
- S 11
- S 12
- M 13
- T 14
- W 15
- T 16
- F 17
- S 18
- S 19
- M 20
- T 21
- W 22
- T 23
- F 24
- S 25
- S 26
- M 27
- T 28
- W 29
- T 30
List of Years
Gregory I
Gregory XIII
Julius II
Julius III
Leo X
Pius V