Hvem daterte Maria Wilhelmina von Neipperg?

Countess Maria Wilhelmina von Neipperg (later Princess of Auersperg) (30 April 1738 - 21 October 1775) was an Austrian noble and court official, known as the mistress of Francis I, Holy Roman Emperor. By birth, she was member of an ancient House of Neipperg and by marriage member of the House of Auersperg.