1151

1151 (MCLI) was a common year starting on Monday of the Julian calendar, the 1151st year of the Common Era (CE) and Anno Domini (AD) designations, the 151st year of the 2nd millennium, the 51st year of the 12th century, and the 2nd year of the 1150s decade. As of the start of 1151, the Gregorian calendar was 7 days ahead of the Julian calendar, which was the dominant calendar of the time.

Millennium:	2nd millennium
Centuries:	11th century – 12th century – 13th century
Decades:	1120s  1130s  1140s  – 1150s –  1160s  1170s  1180s
Years:	1148 1149 1150 – 1151 – 1152 1153 1154

Events

• September 7 — Geoffrey of Anjou dies, and is replaced by his son Henry who is 18 years old.
• The first plague and fire insurance policy is issued in Iceland

Births

• April 3 — Igor Svyatoslavich, Russian prince (d. 1202)
• Unkei, Japanese sculptor (d. 1223)

Deaths

• January 13 — Abbot Suger, French statesman and historian (b. c. 1081)
• April 23 — Adeliza of Leuven, queen of Henry I of England (b. 1103)
• September 7 — Geoffrey V, Count of Anjou (b. 1113)