Historical Events In April - 20
Monday, 20 April 2026
0121 The birth of Marcus Aurelius, Roman emperor 

0295 8th recorded perihelion passage of Halley's Comet 

0850 Guntherus becomes bishop of Cologne 

1139 2nd Lateran Council (10th ecumenical council) opens in Rome 

1441 During the Council of Florence, Pope Eugenius IV issues the bull "Etsi non dubitemus," which asserts the superiority of the pope over the Councils 

1505 Jews are expelled from Orange Burgandy by Philibert of Luxembourg 

1551 John Dudley becomes English Earl Marshal 

1650 VOC-management sets new guidelines 

1653 Cromwell routes English parliament to house 

1657 Battle in Santa Cruz Bay, Tenerife: English fleet under Robert Blake sinks Spanish silver fleet 

1689 The former King James II of England, now deposed, lays siege to Derry. 

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