January 2 » Big Bottom massacre in the Ohio Country, North America, marking the beginning of the Northwest Indian War.
March 4 » The Constitutional Act of 1791 is introduced by the British House of Commons in London which envisages the separation of Canada into Lower Canada (Quebec) and Upper Canada (Ontario).
May 3 » The Constitution of May 3 (the first modern constitution in Europe) is proclaimed by the Sejm of Polish–Lithuanian Commonwealth.
August 4 » The Treaty of Sistova is signed, ending the Ottoman–Habsburg wars.
August 26 » John Fitch is granted a United States patent for the steamboat.
November 9 » Foundation of the Dublin Society of United Irishmen.
When copying data from this family tree, please include a reference to the origin: Vries, "Vries/van der Lijn", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-vries/I23749.php : accessed February 27, 2026), "Femme J. ten Napel (????-1791)".
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