|Ab urbe condita||1911|
|Balinese saka calendar||1079–1080|
|English Regnal year||4 Hen. 2 – 5 Hen. 2|
|Chinese calendar||丁丑年 (Fire Ox)|
3854 or 3794
— to —
戊寅年 (Earth Tiger)
3855 or 3795
|- Vikram Samvat||1214–1215|
|- Shaka Samvat||1079–1080|
|- Kali Yuga||4258–4259|
|Japanese calendar||Hōgen 3|
|Minguo calendar||754 before ROC|
|Seleucid era||1469/1470 AG|
|Thai solar calendar||1700–1701|
1284 or 903 or 131
— to —
1285 or 904 or 132
|Wikimedia Commons has media related to 1158.|
- Emperor Nijō formally succeeds Emperor Go-Shirakawa on the throne of Japan; Go-Shirikawa continues a cloistered rule until his death in 1192.
- 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.
- 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)
- King John by Warren. Published by University of California Press in 1961. p. 27
- Picard, Christophe (2000). Le Portugal musulman (VIIIe-XIIIe siècle. L'Occident d'al-Andalus sous domination islamique. Paris: Maisonneuve & Larose. p. 110. ISBN 2-7068-1398-9.
- Estow, Clara (1982). "The Economic Development of the Order of Calatrava, 1158–1366". Speculum. 57 (2): 267–291. doi:10.2307/2847457.