January 2 » Big Bottom massacre in the Ohio Country, North America, marking the beginning of the Northwest Indian War.
January 25 » The British Parliament passes the Constitutional Act of 1791 and splits the old Province of Quebec into Upper Canada and Lower Canada.
March 2 » Long-distance communication speeds up with the unveiling of a semaphore machine in Paris.
March 4 » Vermont is admitted to the United States as the fourteenth state.
May 3 » The Constitution of May 3 (the first modern constitution in Europe) is proclaimed by the Sejm of Polish–Lithuanian Commonwealth.
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.
Day of death March 6, 1861
The temperature on March 6, 1861 was about 7.2 °C. The air pressure was 10 kgf/m2 and came mainly from the west-southwest. The airpressure was 76 cm mercury. The atmospheric humidity was 91%. Source: KNMI
From February 23, 1860 till March 14, 1861 the Netherlands had a cabinet Van Hall - Van Heemstra with the prime ministers Mr. F.A. baron Van Hall (conservatief-liberaal) and Mr. S. baron Van Heemstra (liberaal).
From March 14, 1861 till January 31, 1862 the Netherlands had a cabinet Van Zuijlen van Nijevelt - Loudon with the prime ministers Mr. J.P.P. baron Van Zuijlen van Nijevelt (conservatief-liberaal) and Mr. J. Loudon (liberaal).
January 1 » Liberal forces supporting Benito Juárez enter Mexico City.
February 4 » American Civil War: In Montgomery, Alabama, delegates from six break-away U.S. states meet and form the Confederate States of America.
March 11 » American Civil War: The Constitution of the Confederate States of America is adopted.
April 15 » President Abraham Lincoln calls for 75,000 Volunteers to quell the insurrection that soon became the American Civil War.
May 20 » American Civil War: The state of Kentucky proclaims its neutrality, which will last until September 3 when Confederate forces enter the state. Meanwhile, the State of North Carolina secedes from the Union.
December 9 » American Civil War: The Joint Committee on the Conduct of the War is established by the U.S. Congress.
When copying data from this family tree, please include a reference to the origin: Dennis Keizer, "Family tree Keizer - van Otterloo", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-keizer-van-otterloo/I2811.php : accessed February 20, 2026), "Willempjen van Tongeren (1791-1861)".
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