"Gerard van Swieten (7 May 1700 – 18 June 1772) was a Dutch physician who from 1745 was the personal physician of the Holy Roman Empress ...
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Maria Theresa and transformed the Austrian health service and medical university education. He was the father of Gottfried van Swieten, patron of Haydn, Mozart and Beethoven." - (en.wikipedia.org 08.11.2019)