The Devils (1971)
Based on The Devils of Loudun by Aldous Huxley, the film is a dramatised historical account of the rise and fall of Urbain Grandier, a 17th century French priest executed for witchcraft following the supposed possessions of Loudun.
Father Grandier's sexual appeal makes the clergy jealous and the nuns outraged, accusing him of sorcery and evil spells, not content until he is burned at the stake.
Ken Russell's film was banned from Italy and its stars Vanessa Redgrave and Oliver Reed were threatened with three years' jail time if they set foot in the country.