How many movies have Francesco Maria Piave and Roberto Tagliavini collaborated on?

They have worked on 4 movies together! Their first movie together was Verdi: La Traviata (Teatro Regio di Parma) (2007) while their highest rated movie together was Verdi: Rigoletto (Teatro Regio di Parma) (2008). They have not worked together since I due Foscari (2013). They are most known for their music films together.