Editing 1040 (section)

== Events ==

=== By place ===
==== Europe ====
* Spring – [[Nikephoros Dokeianos]], Byzantine governor of the [[Catepanate of Italy]], is murdered by Lombard rebels at [[Ascoli Satriano|Ascoli]]. He is replaced by [[Michael Dokeianos]], who arrives in November with a [[Varangians|Varangian]] army.
* [[August 22]]–[[August 23|23]] – [[Battle at Brůdek]]: Duke [[Bretislav I]] of [[Duchy of Bohemia|Bohemia]] defeats the German forces under King [[Henry III, Holy Roman Emperor|Henry III]] ("the Black") in the [[Bohemian Forest]].
* [[Peter Delyan]] leads a rebellion against the [[Byzantine Empire]] and is proclaimed by the Bulgarian nobles as emperor (''[[tsar]]'') Peter II in [[Belgrade]].
* The [[Emirate of Sicily]] is divided and fragmented into small fiefdoms. The Arab nobles of [[Palermo]] restore the regime of the [[Kalbids]] (approximate date).

==== Britain ====
* [[March 17]] – King [[Harold Harefoot]] dies at [[Oxford]] at the age of 24. His illegitimate son [[Ælfwine Haroldsson]] is left in the care of his grandmother, [[Ælfgifu of Northampton]].
* [[June 17]] – [[Harthacnut]] lands at [[Sandwich, Kent|Sandwich]] and reclaims the throne of [[Kingdom of England|England]] which had been taken by Harald Harefoot in [[1035]].
* [[August 14]] – King [[Duncan I of Scotland|Duncan]] is killed in battle against his first cousin and rival [[Macbeth I of Scotland|Macbeth]], who succeeds him as king of [[Kingdom of Scotland|Scotland]].

==== Islamic world ====
* [[May 23]] – [[Battle of Dandanaqan]]: The Turkmen [[Seljuq dynasty|Seljuqs]] defeat the [[Ghaznavids|Ghaznavid]] forces (50,000 men) led by Sultan [[Mas'ud I of Ghazni|Mas'ud I]] at Dandanaqan, a fortress city in the desert near [[Merv]]. Ghaznavid commanders [[Ali Daya]] and [[Begtoghdi]] are blamed for the defeat and executed.

=== By topic ===
==== Religion ====
* [[Weihenstephan Abbey]] (''Kloster Weihenstephan'') in [[Germany]], founds the oldest operating [[brewery]].
* The [[Shalu Monastery]] is founded by the [[Gautama Buddha|Buddhist]] monk [[Chetsun Sherab Jungnay]] in [[Tibet]].