January 28 » The Russian Academy of Sciences is founded in St. Petersburg by Peter the Great, and implemented by Senate decree. It is called the St. Petersburg Academy of Sciences until 1917.
April 7 » Premiere performance of Johann Sebastian Bach's St John Passion, BWV245, at St. Nicholas Church, Leipzig.
November 11 » Joseph Blake, alias Blueskin, a highwayman known for attacking "Thief-Taker General" (and thief) Jonathan Wild at the Old Bailey, is hanged in London.
December 7 » Tumult of Thorn: Religious unrest is followed by the execution of nine Protestant citizens and the mayor of Thorn (Toruń) by Polish authorities.
Day of marriage August 20, 1780
The temperature on August 20, 1780 was about 18.0 °C. Wind direction mainly east-southeast. Weather type: omtrent helder. Source: KNMI
March 17 » American Revolution: George Washington grants the Continental Army a holiday "as an act of solidarity with the Irish in their fight for independence".
May 12 » American Revolutionary War: In the largest defeat of the Continental Army, Charleston, South Carolina is taken by British forces.
August 16 » American Revolutionary War: Battle of Camden: The British defeat the Americans near Camden, South Carolina.
September 23 » American Revolution: British Major John André is arrested as a spy by American soldiers exposing Benedict Arnold's change of sides.
October 2 » American Revolutionary War: John André, a British Army officer, is hanged as a spy by the Continental Army.
November 4 » The Rebellion of Túpac Amaru II against Spanish rule in the Viceroyalty of Peru begins.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I88012.php : accessed February 11, 2026), "Alegonda Pieters Velting (1724-????)".
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