Background
Mantelli was born in Florence, Italy.
Mantelli was born in Florence, Italy.
She possessed a flexible warm voice with a wide vocal range that, while focusing mostly within the mezzo-soprano repertoire, enabled her to sing roles normally associated with contraltos and sopranos. Indeed, during her lifetime she was often identified as either a mezzo-soprano or a contralto by music critics without much consistency. While she had an excellent vocal technique and an exceptionally beautiful tone quality, her gifts as an actress and interpreter were only mediocre.
Her parents were both singing teachers and her earliest musical training was received from them.
She entered the Milan Conservatory, graduating from there in 1877 with diplomas in both voice and piano. That same year she sang the role of Kaled in Jules Massenet"s Le roi de Lahore at the opera house in Treviso.
This was followed by a highly successful concert tour throughout Germany, Italy, Argentina, and Brazil with tenor Julian Gayarre. In November 1887 she sang the role of Adalgisa in Vincenzo Bellini"s Norma at the Teatro Costanzi in Rome.
This was followed by several appearances at the Teatro di San Carlo in Naples, including the role of Eboli in Giuseppe Verdi"s Don Carlo with Adalgisa Gabbi, José Oxilia, Giuseppe Kaschmann, and Auguste Boudouresque.
In 1889 she joined the opera company that inaugurated the Teatro Argentino de Louisiana Plata in Buenos Aires. In 1894 Mantelli joined the roster of the Metropolitan Opera in New York City, making her first appearance there as Amneris in Verdi"s Aida on 23 November. Although she returned to the Met briefly in 1903 and appeared in a few vaudeville productions during the early 1900s, she spent most of her remaining career performing at the Teatro Nacional de São Carlos.
After retiring from the stage, she remained in Lisbon where she taught singing for many years.
She remained a member of the company until the end of the 1899-1900 season.