Satanic lust behind cloister walls…
16-year-old Maria is forced into Serra D'Aires convent, secretly run by Satanists.
- Release Date: March 10, 1977
- Runtime: 85 minutes
- Production countries: Germany, Switzerland
- Original Title: Die Liebesbriefe einer portugiesischen Nonne
- Original Language: Deutsch (German)
Genres: Horror
Actors: William Berger, Herbert Fux, Vítor Mendes, Susan Hemingway, Ana Zanatti