Historical Events In May - 15
Monday, 12 January 2026
0392 Valentinianus II, emperor of Rome (375-392), murdered at 21 on May - 15. 

0756 Abd-al-Rahman I becomes emir of Cordova Spain on this day in history. 

0884 Marinus I ends his reign as Catholic Pope on this day in history. 

0884 On this day in history marinus I, [Martinus II], Pope (882-84), dies 

0913 On May - 15 hatto I, Archbishop of Mainz 

1004 On May - 15 henry II the Saint crowned king of Italy 

1157 On May - 15 yury Dolgoruky, Russian prince 

1174 On May - 15 nur ad-Din Mahmud, King of Syria, dies 

1213 On this day in history english king John names Stephen Langton Archbishop of Canterbury 

1248 On this day in history archbishop Konrad v Hochstaden lays cornerstone for Koln cathedral 

1252 Pope Innocent IV issues the papal bull ad exstirpanda, which authorizes, but also limits, the torture of heretics in the Medieval Inquisition on this day in history. 

1381 Eppelein von Gailingen, German robber baron on this day in history. 

1482 Paolo Toscanelli, Italian physician & mapmaker, dies on May - 15. 

1492 On this day in history cheese & Bread rebellion German mercenaries kills 232 Alkmaarse 

1492 Cheese & Bread rebellion: German mercenaries kills 232 Alkmaarse on May - 15. 

1514 On this day in history jodocus Badius Ascensius publishes Christiern Pedersen's Latin version of Saxo’s Gesta Danorum, the oldest known version of that work. 

1525 German boer army surrounded/slaughters 5,000; ends Boer war on May - 15. 

1536 Anna Boleyn & Lord Rochford accused of adultery/incest on May - 15. 

1565 On this day in history henrick de Keyser, architect/master builder of Amsterdam 

1567 On May - 15 mary, Queen of Scots marries James Hepburn, Earl of Bothwell 

1567 Claudio Giovanni Antonio Monteverdi, Cremona Italy, composer (L'Orfeo) on May - 15. 

1572 Louis van Nassau & huguenots occupy Valenciennes on May - 15. 

1591 Dimitri Ivanovitch, Russian son of czar Ivan IV, murdered at 9 on this day in history. 

1602 Cape Cod discovered by English navigator Bartholomew Gosnold on May - 15. 

1610 Louis XIII appointed King of France on this day in history. 

1610 Parliament of Paris appoints Louis XIII (8) as French king on May - 15. 

1618 Johannes Kepler discovers harmonics law on May - 15. 

1621 Henrick de Keyser, Amsterdam's master builder, dies at 56 on this day in history. 

1622 On May - 15 peter Plancius, Flemish vicar/cartographer, dies at about 69 

1625 16 rebellious farmers hanged in Vöcklamarkt Upper-Austria on this day in history. 

1625 On this day in history 16 rebellious farmers hanged in Vocklamarkt Upper-Austria 

1648 Treaty of Münster Spain & Netherlands ratified on May - 15. 

1648 On this day in history treaty of Munster: Spain & Netherlands ratified 

1648 Treaty of Münster: Spain & Netherlands ratified on this day in history. 

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