February 13
day of the year
February 13 is the 44th day of the year in the Gregorian calendar; 321 days remain until the end of the year (322 in leap years).
Events
Pre-1600
962 – Otto I, Holy Roman Emperor and Pope John XII co-sign the Diploma Ottonianum, recognising John as ruler of Rome.
1258 – Siege of Baghdad: Hulegu Khan, a prince of the Mongol Empire, orders his army to sack and plunder the city of Baghdad, which they had just captured.
1322 – The central tower of Ely Cathedral falls on the night of 12th–13th.
1352 – War of the Straits: The Battle of the Bosporus is fought in a stormy sea into the night between the Genoese, Venetian, Aragonese, and Byzantine fleets.
1462 – The Treaty of Westminster is finalised between Edward IV of England and the Scottish Lord of the Isles.
1503 – Challenge of Barletta: Tournament between 13 Italian and 13 French knights near Barletta.
1542 – Catherine Howard, the fifth wife of Henry VIII of England, is executed for adultery.
1601–1900
1633 – Galileo Galilei arrives in Rome for his trial before the Inquisition.
1642 – The Clergy Act becomes law, excluding bishops of the Church of England from serving in the House of Lords.
Begin with the source’s own compact description: “February 13” is day of the year. The dossier treats that line as a proposition to test through February and year, not as a finished interpretation.
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The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Aug 22, 2026. The linked authority identifier is Q2333. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1600, 1258, 1322 and 1352.
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This entry incorporates text from “February 13” 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.