How many movies have Renzo Arbore and Roberto Benigni acted in together?

They have worked on 4 movies together! Their first movie together was Il Resto del Pap'occhio (1980) while their highest rated movie together was Morto Troisi, viva Troisi! (1982). They have not worked together since FF.SS. cioè '...che mi hai portato a fare sopra a Posillipo se non mi vuoi più bene?' (1983). They are most known for their comedy films together.