Santa Fe Opera for its 1958 premiere). She appeared as Thérèse in the American premiere of Poulenc's Les mamelles de Tirésias at Brandeis University in 1953. She returned to Brandeis two years later to portray the title role in Milhaud's Médée. In 1956 she toured the U.S. with the NBC Opera Company as Countess Almaviva with Walter Cassel as the Count, Adelaide Bishop as Sussana, and Frances Bible as Cherubino. In 1957 she appeared as Elena in Gluck's Paride ed Elena with the American Opera Society. In 1958 she portrayed Floyd's Susannah at the Brussels World's Fair. In the 1959–1960 season she sang two roles with the Philadelphia Lyric Opera Company: Rosalinde and Susannah. In 1959 she made her debut at the Teatro Colón in Buenos Aires. She also made appearances at the Aspen Music Festival, the Cincinnati Opera, the Tanglewood Music Festival, and appeared in concerts with the Boston Symphony Orchestra, the New York Philharmonic, the Philadelphia Orchestra, and The Little Orchestra Society during the 1950s. Later career After the close of the 1959–60 season, Curtin left the employ of the NYCO, although she would continue to perform as a guest artist with the company up through 1964; she returned for performances in 1975 and 1976. She sang Fiordiligi for the NBC Television Opera Theatre in 1960. She sang several roles at the Vienna State Opera from 1960–61, including the title role of Puccini's Madama Butterfly, Fiordiligi, Salome, and Traviata. In 1961 she made her debuts at the Oper Frankfurt, the Staatsoper Stuttgart, and the Teatro Lirico Giuseppe Verdi. She made her first appearance at the Lyric Opera of Chicago in 1965 and her debut at the Seattle Opera in 1969. In the same year she appeared as Donna Anna in Mozart's Don Giovanni at the Glyndebourne Festival. Curtin appeared at the La Scala in Milan in 1962, in Cosí fan tutte opposite Teresa Berganza. In 1966 she appeared in the world premiere of Milhaud's La mère coupable at the Grand Théâtre de Genève. In 1968 she appeared as Mimì in Puccini's La Bohème at the Philadelphia Grand Opera Company with Richard Tucker as Rodolfo and Ron Bottcher as Marcello. Other guest appearances included performances at the Scottish Opera (as Marguerite in Gounod's Faust and Ellen Orford in Britten's Peter Grimes) at La Scala. Curtin made her Metropolitan Opera (Met) debut on November 4, 1961, as Fiordiligi to the