Love Letters of a Portuguese Nun (German: Die Liebesbriefe einer portugesischen Nonne) is a 1977 West German-Swiss film directed by Jesús Franco and produced by Erwin Dietrich, loosely based on the Letters of a Portuguese Nun attributed to Mariana Alcoforado.

It starred Susan Hemingway, (German actress, born in 1960), and William Berger.

Franco co-wrote the screenplay with producer Dietrich.

[2] It tells the story of Maria, a girl in Inquisition-era Portugal, whom a priest sees cavorting with a boy.

In the convent Maria gets subjected to all sorts of torture and humiliation at the hands of the priest and the mother superior.