1231
| Millennium: | 2nd millennium |
|---|---|
| Centuries: | 12th century – 13th century – 14th century |
| Decades: | 1200s 1210s 1220s – 1230s – 1240s 1250s 1260s |
| Years: | 1228 1229 1230 – 1231 – 1232 1233 1234 |
Births
- March 17 – Emperor Shijō of Japan (died 1242)
- Guo Shoujing, Chinese astronomer and mathematician
- John de Warenne, 7th Earl of Surrey (died 1304)
- Roger Mortimer, 1st Baron Wigmore (died 1282)
Deaths
- April 6 – William Marshal, 2nd Earl of Pembroke
- June 13 – Anthony of Padua, Portuguese saint (born 1195)
- November 6 – Emperor Tsuchimikado of Japan (born 1196)
- November 17 – Elisabeth of Hungary, daughter of Andrew II of Hungary and saint (born 1207)
- Abd-el-latif, Arab physician and traveller