Editing 1171 (section)

== Deaths ==
* [[February 20]] &ndash; [[Conan IV, Duke of Brittany|Conan IV]] ('''the Young'''), duke of [[Duchy of Brittany|Brittany]] (b. [[1138]])
* [[March 29]] &ndash; [[Achard of Saint Victor]], Norman bishop (b. [[1100]])
* [[April 3]] &ndash; [[Philip of Milly]], French nobleman and knight (b. [[1120]])
* [[May 1]] &ndash; [[Diarmaid mac Murchadha]], king of [[Leinster]] (b. [[1110]])
* [[June 9]] &ndash; [[Rabbeinu Tam|Jacob ben Meir Tam]], French Jewish [[rabbi]] (b. 1100)
* [[August 8]] &ndash; [[Henry of Blois]], bishop of [[Diocese of Winchester|Winchester]] (b. [[1096]])
* [[September 13]] &ndash; [[Al-Adid]], last Fatimid caliph (b. [[1151]])<ref>{{EI2 | last = Wiet | first = G. | author-link = Gaston Wiet | title = al-ʿĀḍid li-Dīn Allāh | volume = 1 | pages = 196–197 | url = http://dx.doi.org/10.1163/1573-3912_islam_SIM_0311}}</ref>
* [[November 8]] &ndash; [[Baldwin IV, Count of Hainaut|Baldwin IV]], count of [[County of Hainaut|Hainaut]] (b. [[1108]])
* [[December 27]] &ndash; [[Petrus Ua Mórda]], bishop of [[Clonfert]]
* [[Abu'l-Hasan al-Hasan ibn Ali]], Zirid ruler (b. [[1109]])
* [[Ascall mac Ragnaill]] (or '''Torcaill'''), king of [[Kingdom of Dublin|Dublin]]
* [[Gleb of Kiev]] ('''Yuryevich'''), Grand Prince of [[Principality of Kiev|Kiev]]
* [[Iorwerth Goch ap Maredudd]], Welsh nobleman
* [[Narathu]], ruler of the [[Pagan Kingdom]] (b. [[1118]])
* [[Vladimir III Mstislavich]], Grand Prince of Kiev
* [[William de Courcy (died 1171)|William de Courcy]], Norman nobleman and knight
* [[Yesugei]] ('''Baghatur'''), Mongol chieftain (b. [[1134]])