Maria Wilhelmine von Thun und Hohenstein, born Uhlfeldt[1] (Vienna 13 June 1744[2] – Vienna 18 May 1800) was a Viennese countess. She is remembered as the sponsor of a musically and intellectually outstanding salon and for her patronage of music, notably that of Mozart and Beethoven.[3]
^A-Wstm, Taufbuch Tom. B, p. 456. According to [1], "A-Wstm" abbreviates "Vienna [i.e., Wien], St. Michael, Pfarrarchiv". "Taufbuch" is a book of baptismal records, and "Pfarrarchiv" refers to parish archives.