January 14 » The "Fundamental Orders", the first written constitution that created a government, is adopted in Connecticut.
March 13 » Harvard College is named after clergyman John Harvard.
April 14 » Imperial forces are defeated by the Swedes at the Battle of Chemnitz. The Swedish victory prolongs the Thirty Years' War and allows them to advance into Bohemia.
August 22 » Madras (now Chennai), India, is founded by the British East India Company on a sliver of land bought from local Nayak rulers.
January 26 » For the first time, the Ottoman Empire permanently cedes territory to the Christian powers.
February 16 » First Leopoldine Diploma is issued by the Holy Roman Emperor, recognizing the Greek Catholic clergy enjoyed the same privileges as Roman Catholic priests in the Principality of Transylvania.
March 30 » Guru Gobind Singh establishes the Khalsa in Anandpur Sahib, Punjab.
April 14 » Khalsa: The Sikh religion was formalised as the Khalsa - the brotherhood of Warrior-Saints - by Guru Gobind Singh in northern India, in accordance with the Nanakshahi calendar.
When copying data from this family tree, please include a reference to the origin: Klaas Gebert, "Gebert Wereld", database, Genealogy Online (https://www.genealogieonline.nl/gebert-wereld/P787.php : accessed January 29, 2026), "Anna Opel (1639-1699)".
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