Historical Events In March - 20
Friday, 20 March 2026
0141 6th predicted perihelion passage of Halley's Comet 

0141 6th recorded perihelion passage of Halley's Comet 

1345 Satur/ upite/ ars-conjunction; thought "cause of plague epidemic" 

1345 Satur/ upite/ ars-conjunction: thought "cause of plague epidemic" 

1413 King Henry IV, the first English monarch from the Lancastrian dynasty, dies after years of illness, and his eldest son, Henry, ascends to the English throne 

1525 Paris' parliament begins pursuit of Protestants 

1569 Duke van Alva leads "tenth penning" in Ponts the Cé 

1569 Duke van Alva leads "tenth penning" in Ponts the Cé 

1598 French king Henri IV &duke van Mercour sign treaty 

1600 The Linköping Bloodbath takes place on Maundy Thursday in Linköping, Sweden 

1602 Dutch East India Company founded 

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