1172

Millennium:	2nd millennium
Centuries:	11th century – 12th century – 13th century
Decades:	1140s 1150s 1160s – 1170s – 1180s 1190s 1200s
Years:	1169 1170 1171 – 1172 – 1173 1174 1175

1172 by topic
Politics
State leaders – Sovereign states
Birth and death categories
Births – Deaths
Establishments and disestablishments categories
Establishments – Disestablishments
Art and literature
1172 in poetry

Year 1172 (MCLXXII) was a leap year starting on Saturday (link will display the full calendar) of the Julian calendar.

Events

Duke Richard of Aquitaine becomes Duke of Poitiers (later King Richard I of England).
Henry II of England & Humbert III, Count of Savoy agree to wed their respective heirs, John of England & Alicia. The alliance will never happen because Henry's elder heir, Henry the Young King, gets jealous over the castles which the elder Henry promises to the couple and stages a rebellion which will take the elder Henry two years to put down. By that point, Alicia will have died.^[1]
Alberto di Morra is sent by Pope Alexander III to the Council of Avranches, where Henry II of England is absolved of the sin of murder in the matter of the assassination of Thomas Becket.
The Synod of Cashel ends the Celtic Christian system and brings them under Rome.
A Muslim rebellion is quelled at Prades, this event marks the end of the pacification of the lands recently conquered by the Catalans.^[2]

March – Il-Arslan, Khwarazm Shah
March 4 – King Stephen III of Hungary (b. 1147)
June 20 – William III, Count of Ponthieu (b. c. 1095)
December 23 – Ugo Ventimiglia, cardinal
date unknown
- Douce II, Countess of Provence (b. 1165)
- Acharya Hemachandra, Indian mathematician, philosopher and historian (b. 1089)