1040
year
Year 1040 (MXL) was a leap year starting on Tuesday of the Julian calendar.
Events
By place
Europe
Spring – Nikephoros Dokeianos, Byzantine governor of the Catepanate of Italy, is murdered by Lombard rebels at Ascoli. He is replaced by Michael Dokeianos, who arrives in November with a Varangian army.
August 22–23 – Battle at Brůdek: Duke Bretislav I of Bohemia defeats the German forces under King 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 and reclaims the throne of England which had been taken by Harald Harefoot in 1035.
“1040” enters the record as year. Crown Archives preserves that source wording while asking what year can confirm, complicate or overturn.
Why this record matters
“1040” is worth following because a concise public description often conceals a longer documentary argument. Here, year provides the most credible route into that argument.
Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Jul 23, 2026. The linked authority identifier is Q19342. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1040 and 1035.
Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “1040” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.