March 8 » John Casor becomes the first legally-recognized slave in England's North American colonies where a crime was not committed.
March 25 » Saturn's largest moon, Titan, is discovered by Christiaan Huygens.
May 19 » The Invasion of Jamaica begins during the Anglo-Spanish War.
July 31 » Russo-Polish War (1654–67): The Russian army enters the capital of the Grand Duchy of Lithuania, Vilnius, which it holds for six years.
September 8 » Warsaw falls without resistance to a small force under the command of Charles X Gustav of Sweden during The Deluge, making it the first time the city is captured by a foreign army.
December 27 » Second Northern War/the Deluge: Monks at the Jasna Góra Monastery in Częstochowa are successful in fending off a month-long siege.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I63635.php : accessed December 28, 2025), "Petrus Geerts Mejontsma (± 1630-1677)".
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