 His La Scala debut occurred on 26 December of that year in the part of Rodolfo in Giacomo Puccini's "La bohème" with Arturo Toscanini conducting.Audiences in Monte Carlo, Warsaw and Buenos Aires also heard Caruso sing during this pivotal phase of his career and, in 1899–1900, he appeared before the tsar and the Russian aristocracy at the Mariinsky Theatre in Saint Petersburg and the Bolshoi Theatre in Moscow as part of a touring company of first-class Italian singers.The first major operatic role that Caruso created was Federico in Francesco Cilea's "L'arlesiana" (1897); then he was Loris in Umberto Giordano's "Fedora" (1898) at the Teatro Lirico, Milan.