Fosca (opera) Fosca (opera) Fosca is an opera seria in four acts by Brazilian composer Antônio Carlos Gomes to an Italian-language libretto by Antonio Ghislanzoni based on 's 1869 novel "La festa delle Marie". The opera premiered at La Scala in Milan on February 16, 1873. It was a failure because of a dispute between lovers of bel canto and supporters of Wagnerian music-drama. Gomes revised it in 1877, and the premiere of the new version (this time described as a melodramma) on February 7, 1878, also at La Scala, was a success. Since then, performances of the opera, mostly in Brazil,
La Scala a memorable concert conducted by Arturo Toscanini—twice La Scala's principal conductor and an associate of the composers Giuseppe Verdi and Giacomo Puccini—with a soprano solo by Renata Tebaldi, which created a sensation. La Scala hosted the first productions of many famous operas, and had a special relationship with Verdi. For several years, however, Verdi did not allow his work to be played here, as some of his music had been modified (he said "corrupted") by the orchestra. This dispute originated in a disagreement over the production of his "Giovanna d'Arco" in 1845; however the composer later conducted his "Requiem" there