1125

Events 
 May 23 — Lothair of Saxony becomes Holy Roman Emperor on the death of Henry V.
 War ends between Toulouse and Provence.
 The castle of Nassau is built.
 Magnus the Strong becomes ruler of Sweden.
 June 11 — The Crusaders defeat the Seljuk Turks at the Battle of Azaz.

 Births 
 Renaud de Courtenay, Anglo-Norman nobleman (d. 1194)
 Lu You, Chinese poet (d. 1210)

 Deaths 
 January 24 — King David IV of Georgia (b. 1073).
 April 12 — Vladislav I of Bohemia.
 May 19 — Vladimir Monomakh, Grand Duke of Kiev.
 May 23 — Henry V, Holy Roman Emperor (b. 1081).
 October 21 — Cosmas of Prague, Bohemian chronicler.
 Eustace III of Boulogne.
 Ingold II, ruler of Sweden (b. 1105).