1157

Millennium:	2nd millennium
Centuries:	11th century – 12th century – 13th century
Decades:	1120s 1130s 1140s – 1150s – 1160s 1170s 1180s
Years:	1154 1155 1156 – 1157 – 1158 1159 1160

1157 by topic
Politics
State leaders – Sovereign states
Birth and death categories
Births – Deaths
Establishments and disestablishments categories
Establishments – Disestablishments
Art and literature
1157 in poetry

Events

January 12–March 16 – Caliph Al-Muqtafi Successfully defended Baghdad against the coalition forces of Sultan Muhammad of Hamadan,and Atabeg Qutb-adin of Mosul
Albert I of Brandenburg begins his ruthless program to pacify the Slavic region.
June 11 – Albert I of Brandenburg, also called, The Bear (Ger: Albrecht der Bär), becomes the founder of the Margraviate of Brandenburg, Germany and the first Margrave.
August 21 – Sancho III and Ferdinand II, the sons of King Alfonso VII of Castile, divide his kingdom between them upon his death.
October 23—Battle of Grathe Heath: A civil war in Denmark ends with the death of King Sweyn III. Valdemar I of Denmark becomes king of all Denmark and restores and rebuilds the country.
Henry II of England grants a charter to the merchants of Lincoln (approximate date).
Henry II of England invades Wales and is defeated at the Battle of Ewloe by Owain Gwynedd.