This Day in History
Today: February 13, 2026
962
Emperor Otto I and Pope John XII co-sign the Diploma Ottonianum, recognizing John as ruler of Rome.[1]
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.[2]
1322
The central tower of Ely Cathedral falls on the night of 12th–13th.[3]
1462
The Treaty of Westminster is finalised between Edward IV of England and the Scottish Lord of the Isles.[4]
1503
Challenge of Barletta: Tournament between 13 Italian and 13 French knights near Barletta.[5]
1542
Catherine Howard, the fifth wife of Henry VIII of England, is executed for adultery.[6]
1633
Galileo Galilei arrives in Rome for his trial before the Inquisition.[7]
1642
The Clergy Act becomes law, excluding bishops of the Church of England from serving in the House of Lords.[8]
1660
With the accession of young Charles XI of Sweden, his regents begin negotiations to end the Second Northern War.[9]
1689
William and Mary are proclaimed co-rulers of England.[10]
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