How many movies have Donatien Alphonse François de Sade and Jesús Franco collaborated on?

They have worked on 6 movies together! Their first movie together was Marquis de Sade: Justine (1969) while their highest rated movie together was Eugenie de Sade (1973). They have not worked together since Helter Skelter (2000). They are most known for their drama films together.