1120
| Years: 1117 1118 1119 - 1120 - 1121 1122 1123 | |
| Decades: 1090s 1100s 1110s - 1120s - 1130s 1140s 1150s | |
| Centuries: 11th century - 12th century - 13th century | |
Events
- Construction begins on Llandaff Cathedral in Wales
- November 25 - Wreck of the White Ship in the English Channel
- November 25 - William Adelin, son of Henry I of England (died in the White Ship wreck)