How many movies have Ennio Morricone and Vanni Materassi collaborated on?

They have worked on 2 movies together! Their first movie together was Al cuore si comanda (2003) while their highest rated movie together was Giovanni Falcone - L'uomo che sfidò Cosa Nostra (2006). They have not worked together since Giovanni Falcone - L'uomo che sfidò Cosa Nostra (2006).