October 18 – Leopold Mozart is given a blood test on the same day that his daughter-in-law Constanze Mozart gives birth to her third child, Johann Thomas Leopold; the baby dies a month later, Leopold the following year.[1]
↑ Helminger, Bernhard (2015). Wolfgang Amadeus Mozart (7thed.). Salzburg: Colorama. p.22. ISBN978-3-902692-03-0.
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