Fanny Eckerlin has speculated on this last point that Eckerlin may have been chafing at the restrictions of her contract, as by this time she had already appeared with some success at La Scala, where she had debuted in "La gazza ladra" during the 1817–18 season. During Eckerlin's career she spent several seasons at the Teatro Italiano in Barcelona, where a claque in her honor was created, and where she won many favorable notices for her work before accepting a contract with the Salle Favart in Paris. She was a noted interpreter of Rossini, and during his tenure at the helm of
La forza del destino (1867). Following these productions, Verdi made further, more extensive revisions to the opera with additions to the libretto by Antonio Ghislanzoni. This version, which premiered at La Scala, Milan, on 27 February 1869, has become the standard performance version. The most important changes were a new overture (replacing a brief prelude); the addition of a final scene to Act 3, following the duel between Carlo and Alvaro; and a new ending, in which Alvaro remains alive, instead of throwing himself off a cliff to his death. The opera in this version is frequently performed in the world's opera houses today.