February 20 » The Postal Service Act, establishing the United States Post Office Department, is signed by United States President George Washington.
March 29 » King Gustav III of Sweden dies after being shot in the back at a midnight masquerade ball at Stockholm's Royal Opera 13 days earlier. He is succeeded by Gustav IV Adolf.
April 5 » United States President George Washington exercises his authority to veto a bill, the first time this power is used in the United States.
April 25 » Highwayman Nicolas J. Pelletier becomes the first person executed by guillotine.
May 21 » A lava dome collapses on Mount Unzen, near the city of Shimbara on the Japanese island of Kyūshū, creating a deadly tsunami that kills nearly 15,000 people.
September 2 » During what became known as the September Massacres of the French Revolution, rampaging mobs slaughter three Roman Catholic bishops, more than two hundred priests, and prisoners believed to be royalist sympathizers.
When copying data from this family tree, please include a reference to the origin: J. Ham, "Family tree Ham", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-ham/I85324.php : accessed February 24, 2026), "Willem Rosenberg (± 1766-????)".
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