How many movies have Gian Paolo Callegari and Pier Ludovico Pavoni collaborated on?

They have worked on 5 movies together! Their first movie together was The Head of a Tyrant (1959) while their highest rated movie together was Revolt of the Praetorians (1964). They have not worked together since Revolt of the Praetorians (1964). They are most known for their adventure films together.