In 1900, Mascagni toured Moscow and St. Petersburg and, on 17 January 1901, Le maschere was premiered in six Italian theaters.
 Giuseppe Verdi died on 27 January and the following month Mascagni commemorated Verdi's passing.
That same year, he conducted Verdi's Requiem in Vienna.

Mascagni composed the incidental music for Hall Caine's play, The Eternal City in August 1902; the première of the play with Mascagni's music took place in London on 2 October.

In 1902 and 1903, he toured in Canada and in the United States, (in particular Montreal, New York City, Philadelphia, Boston and San Francisco), where he conducted many of his and other composers' works.
The tour was mostly a fiasco, except for the visit to San Francisco where Mascagni was extremely well received.

In 1903, Mascagni left Pesaro after problems with the authorities.
He became director of the Scuola Musicale Romana, in Rome.
In the same year he signed a contract with the French editor Paul de Choudens.

Amica, based on a poem by Choudens with French libretto by Paul Collin, was premiered on 16 March 1905, in Monte-Carlo.
That year, he had disputes with Ruggiero Leoncavallo and Giacomo Puccini.
He also had the Livornese première of Le maschere.

Mascagni was director of the Costanzi for the season beginning in August 1909.
In 1900, Mascagni toured Moscow and St. Petersburg and, on 17 January 1901, Le maschere was premiered in six Italian theaters.  Giuseppe Verdi died on 27 January and the following month Mascagni commemorated Verdi's passing. That same year, he conducted Verdi's Requiem in Vienna.
Mascagni composed the incidental music for Hall Caine's play, The Eternal City in August 1902; the première of the play with Mascagni's music took place in London on 2 October.
In 1902 and 1903, he toured in Canada and in the United States, (in particular Montreal, New York City, Philadelphia, Boston and San Francisco), where he conducted many of his and other composers' works. The tour was mostly a fiasco, except for the visit to San Francisco where Mascagni was extremely well received.
In 1903, Mascagni left Pesaro after problems with the authorities. He became director of the Scuola Musicale Romana, in Rome. In the same year he signed a contract with the French editor Paul de Choudens.
Amica, based on a poem by Choudens with French libretto by Paul Collin, was premiered on 16 March 1905, in Monte-Carlo. That year, he had disputes with Ruggiero Leoncavallo and Giacomo Puccini. He also had the Livornese première of Le maschere.
Mascagni was director of the Costanzi for the season beginning in August 1909.
Pietro Mascagni