Marie Leopoldine Pachler-Koschak was an Austrian musician, composer and salonnière.
In 1817 she met Ludwig van Beethoven, German composer and pianist, who appreciated her musical talent. She also performed with the Austrian composer Franz Schubert in a 1827 charity concert organized by the Graz Music Association. Schubert dedicated his song, "An Sylvia," to Marie Pachler.
