|Ab urbe condita||1918|
|Balinese saka calendar||1086–1087|
|English Regnal year||11 Hen. 2 – 12 Hen. 2|
|Chinese calendar||甲申年 (Wood Monkey)|
3861 or 3801
— to —
乙酉年 (Wood Rooster)
3862 or 3802
|- Vikram Samvat||1221–1222|
|- Shaka Samvat||1086–1087|
|- Kali Yuga||4265–4266|
|Japanese calendar||Chōkan 3 / Eiman 1|
|Minguo calendar||747 before ROC|
|Seleucid era||1476/1477 AG|
|Thai solar calendar||1707–1708|
1291 or 910 or 138
— to —
1292 or 911 or 139
|Wikimedia Commons has media related to 1165.|
- Spring – Emperor Manuel I (Komnenos) makes an alliance with Venice against Emperor Frederick I (Barbarossa), who takes an oath at the Diet of Würzburg to support Antipope Paschal III against Pope Alexander III.
- Andronikos Komnenos, a cousin of Manuel I, escapes from prison at Constantinople. After passing through many dangers, he reaches Kiev and seeks refuge at the court of Prince Yaroslav Osmomysl.
- Gerald the Fearless, Portuguese warrior and adventurer, seizes the city Évora by surprise. The same year (or soon after), he takes Cáceres, Trujillo, Montánchez, Moura, Monsaraz and Alconchel from the Almohads.
- Benjamin of Tudela, Spanish Jewish traveler, sets out on his journey from the northeast Iberian Peninsula (modern Spain), in what begins as a pilgrimage to the Holy Land.
- Otto II (the Rich), margrave of Meissen, grants Leipzig city and market privileges. The city is located at the crossways of the Via Regia and Via Imperii trade routes.
- King Owain ap Gruffydd (the Great) of Gwynedd forms an alliance with his nephew Rhys ap Gruffydd, prince of Deheubarth, to challenge English rule. They drive the English forces out of Wales.
- Battle of Crogen: King Henry II invades Wales, but is defeated and forced to retreat. After Welsh forces under Owain ap Gruffydd inflict an unknown number of casualties on the English army.
- Henry II and the marriage with Queen Eleanor of Aquitaine is effectively ended when she moves back to Aquitaine. Henry begins an affair with Rosamund Clifford.
- December 9 – King Malcolm IV dies at Jedburgh after a 12-year reign and is succeeded by his brother William I (the Lion) as ruler of Scotland (until 1214).
- September 5 – Emperor Nijō abdicates the throne and dies after a 7-year reign. He is succeeded by his 1-year-old son Rokujō as the 79th emperor of Japan.
- In China the Jin Dynasty (Great Jin) and the Song Dynasty make a lasting peace (until 1205).
- Eskil, Danish archbishop of Lund, appoints Fulco as the first bishop of Leal, marking the early beginning of the introduction of Christianity in Estonia.
- Hildegard of Bingen, German Benedictine abbess, founds Eibingen Abbey on the opposite bank of the Rhine near Rüdesheim (approximate date).
- The construction of Liuhe Pagoda (Six Harmonies Pagoda) in Hangzhou, China, is completed during the Song Dynasty.
- August 21 – Philip II, king of France (d. 1223)
- Albéric Clément, Marshal of France (d. 1191)
- Albert of Buxhoeven, bishop of Riga (d. 1229)
- Blacas III, French knight and troubadour (d. 1237)
- Conrad III, German cleric and bishop (d. 1224)
- Henry I (the Brave), duke of Brabant (d. 1235)
- Henry VI, Holy Roman Emperor (d. 1197)
- Hermann von Salza, German nobleman (d. 1239)
- Ibn Arabi, Andalusian philosopher (d. 1240)
- Jean Bodel, French poet and writer (d. 1210)
- Jean de Montmirail, French nobleman (d. 1217)
- Joan of England, queen of Sicily (d. 1199)
- Phillipe de Plessis, French Grand Master (d. 1209)
- Renaud I (or Reginald), French nobleman (d. 1227)
- Ruben II (or Roupen), Armenian prince (d. 1170)
- Shizuka Gozen, Japanese court dancer (d. 1211)
- Theobald Walter, Norman High Sheriff (d. 1206)
- Waleran III (or Walram), duke of Limburg (d. 1226)
- William the Breton, French chronicler (d. 1225)
- January 24 – William of Ypres, Flemish nobleman (b. 1090)
- February 7 – Stephen of Armenia, Armenian nobleman (b. 1111)
- March 27 – Awn al-Din ibn Hubayra, Abbasid vizier (b. 1105)
- April 11
- September 5 – Nijō, emperor of Japan (b. 1143)
- December 9 – Malcolm IV, king of Scotland (b. 1141)
- Goswin of Anchin, Flemish Benedictine abbot (b. 1086)
- Gottfried of Admont, German Benedictine abbot
- Helias de Say (or Hellias), Norman nobleman
- John FitzGilbert, Marshal of England (b. 1105)
- Muhammad al-Idrisi, Arab geographer (b. 1100)
- Rostislav Glebovich, Kievan prince of Minsk
- Sibylla of Anjou, countess of Flanders (b. 1112)