Historical Events In April - 23
Sunday, 21 December 2025
0034 On this day in history christ, crucified, according to Isaac Newton 

0303 George, knight/saint/patron of England, beheaded on April - 23. 

0725 On this day in history wihtred, King of Kent 

0871 On April - 23 ethelred I, king of Wessex/brother of Alfred the Great, dies 

0990 On April - 23 ekkehart II, [Palatinus], monk to St-Gallen/poet, dies 

0997 Vojtech "Adalbert" of Prague, 2nd bishop of Prague/apostle, dies at 40 on this day in history. 

1014 The Battle of Clontarf ends Danish rule in Ireland, but a Dane kills the Irish king Brian Boru, 87 on this day in history. 

1014 King Brian Boru of Ireland beats Danes at Battle of Clontarf on April - 23. 

1014 Brian Boru, king of Ireland, dies in battle at 87 on this day in history. 

1016 On April - 23 aethelbred II "the Unready", king of England (979-1016), dies 

1154 Damascus surrenders to sultan Nur ad-Din van Aleppo on this day in history. 

1229 Ferdinand III of Castile conquers Cáceres on April - 23. 

1343 On this day in history st. George's Night Uprising. 

1348 English order of knighthood founded on this day in history. 

1348 First English order of knighthood founded (Order of the Garter) on April - 23. 

1348 On April - 23 1st English order of knighthood founded (Order of Garter) 

1416 Blaise/Blasius of Parma, Ital astrologist/philosopher/algebra, dies on this day in history. 

1464 Johanna van Valois, Queen of France on this day in history. 

1484 Julius Caesar Scaliger, Italy, scholar (On the Subtlety of Things) on April - 23. 

1500 Pedro Cabral lands & annexes Brazil (Terra da Vera Cruz) on this day in history. 

1500 Alexander Alesius, [Aless/Alane], System theologist/physician on this day in history. 

1501 On April - 23 portuguese navigator Pedro Cabral & 6 ships return to Lisbon 

1504 On April - 23 king Maximilian I routes troops to Bavaria 

1564 The birth of William Shakespeare, English playwright on this day in history. 

1597 On this day in history william Shakespeare's The Merry Wives of Windsor is first performed, with Queen Elizabeth I of England in attendance. 

1598 On this day in history maarten Harpertszoon Tromp, naval commander 

1616 Netherlands buys De Briel/Vlissingen/Fort Rammekens from England on April - 23. 

1616 On this day in history miguel de Cervantes Saavedra, Spanish writer (Don Quixote), dies at 69 

1623 Jan Adam Reincken, composer on this day in history. 

1625 Maurice of Nassau, Prince of Orange, dies at 57 on this day in history. 

1629 John Commelin, director (Hortus Botanicus, Amsterdam) on this day in history. 

1633 Sweden & Protestant German monarchy form Union of Heilbronn on this day in history. 

1635 Oldest US public institution, Boston Latin School founded on this day in history. 

1649 On this day in history andreas Kneller, composer 

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