1158
Year 1158 (MCLVIII) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar.

Events 
 By place 

 Asia 
 Emperor Nijō formally succeeds Emperor Go-Shirakawa on the throne of Japan; Go-Shirikawa continues a cloistered rule until his death in 1192.

 Europe 
 January 11 – Vladislav II becomes king of Bohemia.
 November 29 – Eleanor of Aquitaine arrives in Salisbury, Wiltshire on royal business.
 The Diet of Roncaglia is convoked by Frederick Barbarossa.
 The newborn Margaret of France is shipped to England, as the future wife of the three-year-old Henry the Young King.  The Vexin region is promised as her dowry, and is put under the care of the Knights Templar, until her future husband is old enough to take control of it.
 Margrave Ottokar III of Styria inherits the County of Pitten.
 The Portuguese conquer Palmela, Alcácer do Sal and Sesimbra from the diminished Almoravids.
 Spain: Raymundo, abbot of the Fitero Abbey (Navarra), pledges to defend the fortress of Calatrava from incoming Muslim raiders. It is the founding moment of the Order of Calatrava, the spearhead of the Iberian armies during the Reconquista.

By topic

Economy
 English Pound Sterling (currency) is introduced.

Education
 The University of Bologna is granted its first privileges by Emperor Frederick Barbarossa.

Religion
 The Diocese of Derry is founded in Ireland.

Births 
 September 23 – Geoffrey II, Duke of Brittany (d. 1186)
 Yvette of Huy, Roman Catholic prophet and anchorite (d. 1228)
 Taira no Shigehira, son of Taira no Kiyomori (d. 1185)

Deaths 
 April 26 – Martyrius, Archbishop of Esztergom, Hungarian prelate
 July 27 – Geoffrey VI, Count of Anjou (b. 1134)
 August 20 – Rögnvald Kali Kolsson (b. 1100), Earl of Orkney and Saint
 August 31 – King Sancho III of Castile (b. 1134)
 September 22 – Otto of Freising, German bishop and chronicler (b. c. 1114)
 Oda of Brabant, saint and prioress  (b. 1134)
 Anselm of Havelberg, German-born bishop and papal legate (c. c. 1100)

References