January 11 » William Herschel discovers Titania and Oberon, two moons of Uranus.
February 3 » Militia led by General Benjamin Lincoln crush the remnants of Shays' Rebellion in Petersham, Massachusetts.
May 25 » After a delay of 11 days, the United States Constitutional Convention formally convenes in Philadelphia after a quorum of seven states is secured.
July 13 » The Continental Congress enacts the Northwest Ordinance establishing governing rules for the Northwest Territory. It also establishes procedures for the admission of new states and limits the expansion of slavery.
September 17 » The United States Constitution is signed in Philadelphia.
October 29 » Mozart's opera Don Giovanni receives its first performance in Prague.
When copying data from this family tree, please include a reference to the origin: Ben Peijsel, "Family tree Peijsel", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-peijsel/I37745.php : accessed February 19, 2026), "Pieter Cornelisz Koekoek (????-1787)".
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