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| Millennia: | 2nd millennium |
| Centuries: | 11th century - 12th century - 13th century |
| Decades: | 1110s 1120s 1130s - 1140s - 1150s 1160s 1170s |
| Years: | 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 |
| Categories: | Births - Deaths - Architecture Establishments - Disestablishments |
Events and trends
- Abbot Suger rebuilds the monastery of St Denis outside Paris, seen as the initiation of the Gothic style.
- Gratian's Decretals reinvigorate study of canon law and civil law.
- 1142 — End of the reign of Emperor Sutoku, emperor of Japan
- 1142 — Emperor Konoe ascends to the throne of Japan
- 1143 — Celestine II elected pope
- 1144 — Pope Celestine II is succeeded by Pope Lucius II
- 1146 — Saint Bernard of Clairvaux preaches the Second Crusade at Vezelay, Burgundy
- 1145–1147 — Second Crusade — Crusaders capture Lisbon from Muslims
- 1148 — The Alexiad is written by the Byzantine historian Anna Comnena, daughter of Alexius I.