1184

1184 (MCLXXXIV) was a leap year starting on Sunday of the Julian calendar, the 1184th year of the Common Era (CE) and Anno Domini (AD) designations, the 184th year of the 2nd millennium, the 84th year of the 12th century, and the 5th year of the 1180s decade. As of the start of 1184, the Gregorian calendar was 7 days ahead of the Julian calendar, which was the dominant calendar of the time.

• Abbeville receives its commercial charter.
• The Battle of Fimreite takes place.
• Archbishop Absalon of Lund wins a naval victory over Bogislav, duke of Pomerania.
• Streets of Paris paved by order of Philip Augustus.
• Second Battle of Uji
• Abu Yusuf Ya'qub al-Mansur — third Almohad Caliph
• Papal bull ad aboldendam issued against several European heretical groups: the Cathars, the Waldensians, the Patarines and the Humiliati. It was created after a landmark meeting between the Holy Roman Empire under Frederick Barbarossa and the Roman Church under Pope Lucius III.

• April 11 — William of Winchester, Lord of Lunenburg (d. 1213)
• Eleanor, Fair Maid of Brittany (approximate date; d. 1241)
• Saadi, Iranian poet (d. 1291)

• February 16 — Richard of Dover, Archbishop of Canterbury
• March 27 — Giorgi III, king of Georgia
• June 15 — Magnus Erlingsson, king of Norway (b. 1156)
• July 29 — Yusuf I, Almohad Caliph

• England — Henry II Curt Mantle, King of England (reigned 1154–1189).
• France — Philippe II, Auguste King of France (reigned from 1180–1223).