March 18 » The first modern republic in Germany, the Republic of Mainz, is declared by Andreas Joseph Hofmann.
June 2 » French Revolution: François Hanriot, leader of the Parisian National Guard, arrests 22 Girondists selected by Jean-Paul Marat, setting the stage for the Reign of Terror.
June 10 » The Jardin des Plantes museum opens in Paris. A year later, it becomes the first public zoo.
July 13 » Journalist and French revolutionary Jean-Paul Marat is assassinated in his bathtub by Charlotte Corday, a member of the opposing political faction.
November 10 » A Goddess of Reason is proclaimed by the French Convention at the suggestion of Pierre Gaspard Chaumette.
December 9 » New York City's first daily newspaper, the American Minerva, is established by Noah Webster.
Day of death May 20, 1867
The temperature on May 20, 1867 was about 12.5 °C. There was 3 mm of rain. The air pressure was 1 kgf/m2 and came mainly from the west-southwest. The airpressure was 75 cm mercury. The atmospheric humidity was 95%. Source: KNMI
From June 1, 1866 till June 4, 1868 the Netherlands had a cabinet Van Zuijlen van Nijevelt - Heemskerk with the prime ministers Mr. J.P.J.A. graaf Van Zuijlen van Nijevelt (AR) and Mr. J. Heemskerk Azn. (conservatief).
When copying data from this family tree, please include a reference to the origin: J Eijsermans, "Eijsermans family tree", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-eijsermans/I487488.php : accessed February 23, 2026), "Jeltje Jans Helder- Helder (1793-1867)".
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