Verona Arena
Graf staged Maria Callas in "Les vêpres siciliennes" (at the Florence May Festival and La Scala, 1951), "Mefistofele" (at the Verona Arena, in which Callas alternated with Magda Olivero, 1954), and "Poliuto" (at La Scala, 1960, also with Franco Corelli and Ettore Bastianini).