March 10 » French Huguenot Jean Calas, who had been wrongly convicted of killing his son, dies after being tortured by authorities; the event inspired Voltaire to begin a campaign for religious tolerance and legal reform.
May 22 » Sweden and Prussia sign the Treaty of Hamburg.
May 22 » Trevi Fountain is officially completed and inaugurated in Rome.
July 9 » Catherine the Great becomes Empress of Russia following the coup against her husband, Peter III.
September 12 » The Sultanate of Sulu ceded Balambangan Island to the British East India Company
October 6 » Seven Years' War: The British Capture Manila from Spain and occupy it.
Day of marriage December 11, 1787
The temperature on December 11, 1787 was about 6.0 °C. Source: KNMI
May 25 » After a delay of 11 days, the United States Constitutional Convention formally convenes in Philadelphia after a quorum of seven states is secured.
August 6 » Sixty proof sheets of the Constitution of the United States are delivered to the Constitutional Convention in Philadelphia, Pennsylvania.
September 17 » The United States Constitution is signed in Philadelphia.
September 28 » The Congress of the Confederation votes to send the newly-written United States Constitution to the state legislatures for approval.
October 29 » Mozart's opera Don Giovanni receives its first performance in Prague.
December 18 » New Jersey becomes the third state to ratify the U.S. Constitution.
When copying data from this family tree, please include a reference to the origin: Jaap Voets, "Family tree Voets", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-voets/I422.php : accessed March 10, 2026), "Abraham Jongeling (1762-< 1836)".
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