January 28 » The Carnegie Institution of Washington is founded in Washington, D.C. with a $10 million gift from Andrew Carnegie.
March 6 » Real Madrid CF is founded.
May 17 » Greek archaeologist Valerios Stais discovers the Antikythera mechanism, an ancient mechanical analog computer.
October 24 » Guatemala's Santa María Volcano begins to erupt, becoming the third-largest eruption of the 20th century.
November 21 » The Philadelphia Football Athletics defeated the Kanaweola Athletic Club of Elmira, New York, 39–0, in the first ever professional American football night game.
November 29 » The Pittsburgh Stars defeated the Philadelphia Athletics, 11–0 to win the first championship associated with an American national professional football league.
Day of death March 17, 1903
The temperature on March 17, 1903 was between -2.2 °C and 11.3 °C and averaged 6.0 °C. There was 7.9 hours of sunshine (66%). Source: KNMI
July 4 » The Philippine–American War is officially concluded.
July 20 » The Ford Motor Company ships its first automobile.
August 18 » German engineer Karl Jatho allegedly flies his self-made, motored gliding airplane four months before the first flight of the Wright brothers.
October 1 » Baseball: The Boston Americans play the Pittsburgh Pirates in the first game of the modern World Series.
October 6 » The High Court of Australia sits for the first time.
November 18 » The Hay–Bunau-Varilla Treaty is signed by the United States and Panama, giving the United States exclusive rights over the Panama Canal Zone.
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/I199210.php : accessed October 22, 2026), "Anna Elisabeth Arwert (1902-1903)".
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