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.