March– Conrad II converges his armies on Lake Lemano and defeats Count Odo II in battle at Geneva (modern Switzerland). For his assistance, Conrad grants Humbert I with the Burgundian county of Maurienne.
May– King Mieszko II dies after a 6-year reign (probably killed as a result of a conspiracy) and is succeeded by his 17-year-old son Casimir I (the Restorer). A violent revolt spreads throughout Poland.
November 25– King Malcolm II dies in battle at Glamis. He is succeeded by Duncan I, son of his eldest daughter, rather than Macbeth, who is possibly another grandson of his.
In Al-Andalus, benefiting from the weakening of the Muslim central authority, the count of Portugal, Gonçalo Maia, conquers Montemor-o-Velho (approximate date).