upright=1.35|thumb|[[Ferdinand I of León|Ferdinand I (the Great) (c. 1015–1065)]]
Year 1037 (MXXXVII) was a common year starting on Saturday of the Julian calendar.
Events
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By place
Europe
- Spring – A revolt in northern Italy is started by Archbishop Aribert of Milan. King Henry III (eldest son of Emperor Conrad II) travels south of the Alps to quell it.
- February – At an Imperial Diet in Pavia (assembled by Conrad II), Aribert is accused of fomenting a revolt against the Holy Roman Empire, Conrad orders his arrest.
- May – Conrad II, with Pavian assistance, lays siege to Milan at the Porta Romana side, but the city holds out. In Rome, Pope Benedict IX deposes Aribert as archbishop.
- May 28 – Conrad II decrees the Constitutio de Feudis which protects the rights of the valvassores (knights and burghers of the cities) in Lombardia (modern Italy).
- Summer – A Byzantine expeditionary force under George Maniakes lands at Sicily, and defeats the Zirids. Maniakes begins his campaign to reconquer the island.
- September 4 – Battle of Tamarón: Ferdinand I defeats and kills his brother-in-law Bermudo III. Ferdinand becomes the king of Castile and León (modern Spain).
- November 15 – Battle of Bar-le-Duc: Odo II, Count of Blois and Champagne, while invading the Duchy of Lorraine dies in battle with forces loyal to Gothelo I.
England
- King Harold I seizes the throne of England from his half-brother Harthacnut. His mother, Emma of Normandy, flees to Bruges in Flanders (modern Belgium).
Asia
- The Chinese rime dictionary of the Jiyun is published during the Song Dynasty.
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- The Great Seljuk Empire is established by Tugrul Bey.
Births
- January 8 – Su Dongpo, Chinese calligrapher (d. 1101)
- Beatrice I, German abbess of Quedlinburg (d. 1061)
- Hawise, duchess of Brittany (approximate date)
Deaths
- September 4 – Bermudo III (or Vermudo), king of León
- November 15 – Odo II, French nobleman (b. 983)
- Abu'l-Hasan Mihyar al-Daylami, Persian poet
- Abu Mansur al-Baghdadi, Persian Shafi'i scholar
- Baba Kuhi of Shiraz, Persian Sufi mystic (b. 948)
- Avicenna, Persian physician and polymath (b. 980)
- Boleslaus III (the Red), duke of Bohemia
- Ding Wei, grand chancellor of the Song Dynasty
- Farrukhi Sistani, Persian poet (or 1038)
- John of Debar, Bulgarian clergyman and bishop
- Muhammad al-Baghdadi, Persian mathematician
- Muirgeas ua Cú Ceanainn, king of Uí Díarmata
- Robert II, French prelate and archbishop
- Siegfried II, German nobleman (b. 956)
- William III (Taillefer), French nobleman