How many movies have Antonio Somma and Giuseppe Verdi collaborated on?

They have worked on 9 movies together! Their first movie together was Verdi Un Ballo in Maschera (1975) while their highest rated movie together was The Metropolitan Opera: Un Ballo in Maschera (2012). They have not worked together since The Metropolitan Opera: Un Ballo in Maschera (2012). They are most known for their music films together.