January 8 » The premiere of George Frideric Handel's Ariodante takes place at the Royal Opera House, Covent Garden.
March 10 » An agreement between Nader Shah and Russia is signed near Ganja, Azerbaijan and Russian troops are withdrawn from occupied territories.
July 11 » Mathematical calculations suggest that it is on this day that dwarf planet Pluto moved inside the orbit of Neptune for the last time before 1979.
August 5 » Freedom of the press: New York Weekly Journal writer John Peter Zenger is acquitted of seditious libel against the royal governor of New York, on the basis that what he had published was true.
Day of death March 30, 1791
The temperature on March 30, 1791 was about 10.0 °C. Wind direction mainly northeast. Weather type: zeer betrokken. Source: KNMI
February 18 » Congress passes a law admitting the state of Vermont to the Union, effective 4 March, after that state had existed for 14 years as a de facto independent largely unrecognized state.
May 3 » The Constitution of May 3 (the first modern constitution in Europe) is proclaimed by the Sejm of Polish–Lithuanian Commonwealth.
May 15 » French Revolution: Maximilien Robespierre proposes the Self-denying Ordinance.
July 17 » Members of the French National Guard under the command of General Lafayette open fire on a crowd of radical Jacobins at the Champ de Mars, Paris, during the French Revolution, killing scores of people.
September 5 » Olympe de Gouges writes the Declaration of the Rights of Woman and of the Female Citizen.
October 1 » First session of the French Legislative Assembly.
When copying data from this family tree, please include a reference to the origin: Wim Helsdingen, "Family tree Helsdingen", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-helsdingen/I672.php : accessed February 12, 2026), "Mattheus Sonnemaens (1711-1791)".
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