"Mother Joan of the Angels" (= "Matka Jonna od Aniolow") is a strange 1961 film directed by Jerzy Kawalerowicz, that manages to show the way in which faith, superstition and fanaticism can mix.
The story that this film tells is set in 17th century Poland, and it is, to say the least, unusual. The main character is Father Suryn (Mieczyslaw Voit), a priest that arrives to a convent in order to exorcise a group of nuns possessed by the demon. Their leader is the abbess, Mother Joan (Lucyna Winnicka), a beautiful young woman that seems to embrace the choice of being possessed by the demon, given that she is aware that she cannot be a saint, and would rather be damned than like everybody else. Father Suryn begins to care too much for her, having his faith tested while he strives to save the nuns and not lose his soul in the process.
Even though this film is loosely based on real facts, I think that its real power comes from the subjective way in which the director chose to tell it. When you finish watching this powerful movie, you don't know whether you liked it or not, but you are sure that "Mother Joan of the Angels" is an enduring work of art worth-seeing. Recommended...