How many movies have Franco D'Andria and Pier Vittorio Marchi collaborated on?

They have worked on 7 movies together! Their first movie together was The Tyrant of Lydia Against the Son of Hercules (1963) while their highest rated movie together was Assault on the State Treasure (1967). They have not worked together since Samoa, Queen of the Jungle (1968). They are most known for their adventure films together.