1177

Events 
 November 25 — Baldwin IV of Jerusalem and Raynald of Chatillon beat Saladin at the Battle of Montgisard.
 During the third year of the Angen era in Japan, a fire devastates Kyoto.
 Benedictus Abbas becomes abbot of Peterborough.
 Byland Abbey is started in Yorkshire by the Cistercians.
 Casimir II becomes duke of Poland.
 The Cham sack the Khmer capital of Angkor Wat.
 Roger de Moulins becomes Grand Master of the Knights Hospitaller.
 Moscow is burned down.
 Puigcerdà is founded by Alfonso II of Aragon.
 Leopold V becomes Duke of Austria.
 September 27 — Pope Alexander III sends a letter to Prester John, believing he is real.
 Treaty of Venice — Frederick I Barbarossa accepts Alexander III as Pope
 Estonians attack Pskov during winter.

 Births 
 Baldwin V, king of Jerusalem (d. 1186)
 Robert de Ros, English baron (d. 1226)
 Philip of Swabia, enemy of Otto IV, Holy Roman Emperor (d. 1208)

 Deaths 
 January 13 — Henry II of Austria (b. 1107)
 William of Montferrat, Count of Jaffa and Ascalon, father of Baldwin V of Jerusalem (b. early 1140s)
 Hugh Bigod, 1st Earl of Norfolk (b. 1095)

 Heads of State 
 England — Henry II (reigned 1154–1189)
 France — Louis VII (reigned 1137–1180)
 Byzantine Empire — Manuel I Comnenus (reigned 1143–1180)
 Pope — Alexander III (pope 1159–1181)
 Song China – Song Xiaozong (宋孝宗) (reigned 1162–1189)