The Nun and the Devil (Italian: Le Monache di Sant'Arcangelo) is an erotic 1973 Italian nunsploitation film directed by Domenico Paolella. It is also known as: Sisters of Satan (UK) and The Nuns of Saint Archangel (US). The action is set in the 16th century at the convent of Sant Arcangelo, near Naples, then under Spanish rule. The success of the film resulted in another period drama/nunsploitation film by Paolella released the same year, Story of a Cloistered Nun, an Italian/French/West German co-production starring Eleonora Giorgi.

The opening credits state that the movie is "Based on authentic 16th Century records and a story by Stendhal"—possibly Stendhal's L'Abbesse de Castro (1832) is meant.