 First part of Pier Paolo Pasolinis Trilogy of Death. The subsequent  two parts were never filmed because Pasolini was murdered some  months after he has finished this movie. The trilogy was intended as  complementary to the previous Trilogy of Life, including Decameron,  Il (1971), Racconti di Canterbury, I (1972) and Fiore delle mille e  una notte, Il (1974).