How many movies have Ernesto Gavazzi and Giuseppe Verdi collaborated on?

They have worked on 4 movies together! Their first movie together was Aida (1985) while their highest rated movie together was Nabucco (1986). They have not worked together since Verdi, Un Ballo in Maschera - Salvatore Licitra, Maria Guleghina, Riccardo Muti, Teatro alla Scala (2001). They are most known for their music films together.