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- April – Abd al-Mu'min destroys the Almoravid Empire, after capturing Marrakech and killing the last emir, Ishaq ibn Ali.
- The Siculo-Normans take control of Gabes.
- The Second Crusade begins.
- June – The Wendish Crusade fails to convert most of the Polabian Slavs.
- The cities of Moscow and Vologda are first mentioned in written records.
- July 1–October 25 – Siege of Lisbon: With the support of English and Flemish Crusaders, Afonso I of Portugal besieges and conquers Lisbon. The same year, the troops of the young Portuguese kingdom take Sintra and Santarém, and sack Palmela.
- September – The German contingent of the Second Crusade arrives at Constantinople; after a battle before the city walls, the Germans accept being ferried over the Bosporus to Asia.
- Roger II of Sicily takes Corfu from the Byzantine Empire, and pillages Corinth, Athens and Thebes.
- October 7 – Almería, one of the most important maritime and commercial centers of al-Andalus, falls into Christian hands, after two months of siege.
- Almohad general Berraz ibn Mohammad al-Masufi conquers Seville.
- The church of San Frediano in Lucca is consecrated.
- Dore Abbey is founded is England.
- Hildegard of Bingen founds the convent of Rupertsberg near Bingen.
- Jedburgh Abbey is founded by David I of Scotland.
- May 9 – Minamoto no Yoritomo, Japanese shogun (d. 1199)
- Emperor Guangzong of Song (d. 1200)
- Princess Sukeko of Japan (d. 1216)
- Hugh de Kevelioc, 3rd Earl of Chester (d. 1181)
- Ibn Qudamah, Islamic scholar (d. 1223)
- Shōkū, Buddhist leader (d. 1247)
- King Stephen III of Hungary (d. 1172)
- Taira no Munemori, Japanese warrior (d. 1185)
- Wada Yoshimori, Japanese military commander (d. 1213)
- probable – Raimbaut of Orange, troubadour (d. 1173)
- January 13 – Robert de Craon, second Grand Master of the Knights Templar
- April 6 – Frederick II, Duke of Swabia, (b. 1090)
- April – Fannu, Almoravid Princess and warrior
- September 19 – Igor II of Kiev
- October 31 – Robert, 1st Earl of Gloucester, English politician (b. c. 1090)
- December 25 – Guy II, Count of Ponthieu (b. c. 1120)
- date unknown
- Bresc, Henri (2003). "La Sicile et l'espace libyen au Moyen Age" (PDF). Retrieved 17 January 2012.
- King John by Warren. Published by University of California Press in 1961. p. 67
- Picard, Christophe (2000). Le Portugal musulman (VIIIe-XIIIe siècle. L'Occident d'al-Andalus sous domination islamique. Paris: Maisonneuve & Larose. p. 109. ISBN 2-7068-1398-9.
- Picard C. (1997) La mer et les musulmans d'Occident au Moyen Age. Paris: Presses Universitaires de France, pp.66
- Picard C. (1997) La mer et les musulmans d'Occident au Moyen Age. Paris: Presses Universitaires de France, pp.64