A mysterious aristocrat and her mentally challenged sister are the subject of public curiosity aimed at unveiling their strange bond and respective sex lives.
- Release Date: January 1, 1976
- Runtime: 79 minutes
- Production countries: Switzerland
- Original Title: Die Marquise von Sade
- Original Language: Deutsch (German)
Genres: Horror
Actors: Lina Romay, Monica Swinn, Martine Stedil, Raymond Hardy, Peggy Markoff