May 12 » Maria Theresa of Austria is crowned Queen of Bohemia after defeating her rival, Charles VII, Holy Roman Emperor.
May 19 » Jean-Pierre Christin developed the centigrade temperature scale.
June 27 » In the Battle of Dettingen, George II becomes the last reigning British monarch to participate in a battle.
September 13 » Great Britain, Austria and the Kingdom of Sardinia sign the Treaty of Worms.
Day of death July 19, 1791
The temperature on July 19, 1791 was about 15.0 °C. There was 22 mm of rainWind direction mainly north west from. Weather type: betrokken regen. 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.
August 22 » Beginning of the Haitian Slave Revolution in Saint-Domingue, Haiti.
September 13 » King Louis XVI of France accepts the new constitution.
September 30 » The first performance of Mozart's opera The Magic Flute takes place two months before his death.
October 1 » First session of the French Legislative Assembly.
December 15 » The United States Bill of Rights becomes law when ratified by the Virginia General Assembly.
When copying data from this family tree, please include a reference to the origin: Martin Hessing, "Family tree Hessing", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-hessing/I1600.php : accessed January 12, 2026), "Cornelis de Man (1711-1791)".
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