July 6 » Pope Benedict XIV suppresses the Patriarchate of Aquileia and establishes from its territory the Archdiocese of Udine and Gorizia.
December 14 » The Theresian Military Academy is founded in Wiener Neustadt, Austria.
Day of marriage May 11, 1771
The temperature on May 11, 1771 was about 15.0 °C. Wind direction mainly south-southwest. Weather type: omtrent helder. Special wheather fenomena: wat dauw. Source: KNMI
February 12 » Gustav III becomes the King of Sweden.
May 16 » The Battle of Alamance, a pre-American Revolutionary War battle between local militia and a group of rebels called The "Regulators", occurs in present-day Alamance County, North Carolina.
July 14 » Foundation of the Mission San Antonio de Padua in modern California by the Franciscan friar Junípero Serra.
July 17 » Bloody Falls massacre: Chipewyan chief Matonabbee, traveling as the guide to Samuel Hearne on his Arctic overland journey, massacres a group of unsuspecting Inuit.
October 17 » Premiere in Milan of the opera Ascanio in Alba, composed by Mozart at age 15.
When copying data from this family tree, please include a reference to the origin: R.A.Hemerik, "Descendants Hemerik-Broekhuizen-Huner-Koper-Barink", database, Genealogy Online (https://www.genealogieonline.nl/parenteel-hemerik/I103642.php : accessed February 2, 2026), "Helena "Lena" IJsselstein (1751-????)".
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