1140s

Millennium:	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

The 1140s decade ran from January 1, 1140, to December 31, 1149.

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, Alphonse VII The King of Leon and Castille recognises Portugal as an independent Kingdom and Alphonse I of Portugal as it's King through the Treaty of Zamora
1144—Pope Celestine II is succeeded by Pope Lucius II
1146—Saint Bernard of Clairvaux preaches the Second Crusade at Vézelay, Burgundy
1145–1147—Second Crusade—Crusaders capture Lisbon from Muslims
1148—The Alexiad is written by the Byzantine historian Anna Komnene, daughter of Alexius I.