Of the bass Dario Caselli little is known, but he first sang at La Scala in 1948 in Prokofiev’s Love for Three Oranges, and later appeared in Aida, Fidelio and La forza del destino. His career was entirely based in Italy. He took part in seven complete operas for Decca during the 1950s, including Otello, Rigoletto, Manon Lescaut and La fanciulla del West, all with Mario Del Monaco.