Opéra de Monte-Carlo performing the roles of Erda, Flosshilde, and Waltraute in Richard Wagner's The Ring Cycle. She was also heard there as Stéphano in Roméo et Juliette. Career as a soprano In 1912, Bériza began performing leading soprano roles at the Opéra-Comique. There she had major success in roles like Musetta in Puccini's La bohème, Santuzza in Pietro Mascagni's Cavalleria rusticana, Violetta in Giuseppe Verdi's La traviata, and the title roles in Ambroise Thomas's Mignon and Puccini's Tosca. She also continued to perform roles traditionally sung by mezzo-sopranos like Anita in Jules Massenet's La Navarraise and Mallika in Léo Delibes's Lakmé. She sang leading roles as a guest artist at the Grand Théâtre de Genève, the Opéra de Marseille, the Opéra de Nice, and the Opéra National de Lyon. While still performing occasionally at the Opéra-Comique, Bériza gave numerous performances in the United States during the second decade of the 20th century. In late 1913 she came to the United States for the first time to sing with the Boston Opera Company; making her debut with the company in January 1914 as Musetta to the Mimi of Maggie Teyte. She appeared in several more roles with the company that year, including Antonia in The Tales of Hoffmann, Marguerite in Gounod's Faust and the title roles in Gustave Charpentier's Louise and Henry Février's Monna Vanna (replacing Mary Garden in the role). Bériza sang Monna Vanna for her debut with the Chicago Grand Opera Company in 1915. She performed in several operas at Ravinia Park, Illinois (with the Chicago Symphony Orchestra), in July–August 1916, including singing Cio-Cio-San in Puccini's Madama Butterfly, Marguerite, Santuzza, Tosca, and the title role in Georges Bizet's Carmen. She returned to Ravinia in the summer of 1917 to sing the French national anthem, Leonora in Verdi's Il trovatore, and, with Orville Harrold, Santuzza and the title role in Massenet's Manon. She performed at Ravinia again in 1928. In 1917 she toured the United States with the Giuseppe Creatore Grand Opera Company and appeared at the Odeon Theatre in St. Louis, Missouri in the world premiere of Homer Moore's Louis XIV. In 1923, Bériza joined the roster of the Théâtre Fiametta in Paris where she performed in several contemporary stage works. In 1924 she starred in the world premiere of Lord Berners's Le Carrosse du Saint Sacrement at the Théâtre des Champs-Élysées. She was also heard at that