May 24 » The Ashmolean Museum in Oxford, England, opens as the world's first university museum.
September 11 » Battle of Vienna: Coalition forces, including the famous winged Hussars, led by Polish King John III Sobieski lift the siege laid by Ottoman forces.
September 12 » Austro-Ottoman War: Battle of Vienna: Several European armies join forces to defeat the Ottoman Empire.
September 17 » Antonie van Leeuwenhoek writes a letter to the Royal Society describing "animalcules".
October 3 » Qing dynasty naval commander Shi Lang receives the surrender of the Tungning kingdom on Taiwan after the Battle of Penghu.
November 1 » The British Crown colony of New York is subdivided into 12 counties.
Day of death August 20, 1721
The temperature on August 20, 1721 was about 15.0 °C. Source: KNMI
January 6 » The Committee of Inquiry on the South Sea Bubble publishes its findings, revealing details of fraud among company directors and corrupt politicians.
March 24 » Johann Sebastian Bach dedicated six concertos to Margrave Christian Ludwig of Brandenburg-Schwedt, now commonly called the Brandenburg Concertos, BWV 1046-1051.
April 4 » Sir Robert Walpole becomes the first British prime minister.
April 26 » A massive earthquake devastates the Iranian city of Tabriz.
August 18 » The city of Shamakhi in Safavid Shirvan is sacked.
October 22 » Russian Empire is proclaimed by Tsar Peter I after the Swedish defeat in the Great Northern War.
When copying data from this family tree, please include a reference to the origin: Rod Castel, "Geuer Castel Family Tree", database, Genealogy Online (https://www.genealogieonline.nl/geuer-castel-family-tree/I4446.php : accessed April 30, 2025), "Maria Weller (± 1664-1721)".
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