How many movies have Dante Ferretti and Vanni Castellani collaborated on?

They have worked on 3 movies together! Their first movie together was The Canterbury Tales (1972) while their highest rated movie together was Salò, or the 120 Days of Sodom (1976). They have not worked together since Salò, or the 120 Days of Sodom (1976). They are most known for their comedy films together.