The Devils of Loudun is a 1952 non-fiction novel by Aldous Huxley. It is a historical narrative of supposed demonic possession, religious fanaticism, sexual repression, and mass hysteria which occurred in seventeenth-century France surrounding unexplained events that took place in the small town of Loudun. It centers on Roman Catholic priest Urbain Grandier and an entire convent of Ursuline nuns, who allegedly became possessed by demons after Grandier made a pact with Satan.