February 22 » Ferdinando II de' Medici, Grand Duke of Tuscany, the dedicatee, receives the first printed copy of Galileo's Dialogue Concerning the Two Chief World Systems .
March 29 » Treaty of Saint-Germain is signed returning Quebec to French control after the English had seized it in 1629.
April 15 » Battle of Rain: Swedes under Gustavus Adolphus defeat the Holy Roman Empire during the Thirty Years' War.
July 23 » Three hundred colonists bound for New France depart from Dieppe, France.
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/I544722.php : accessed January 13, 2026), "Herman Pauwels Joost van Heijst".
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