Sandra Warfield performed with the Zurich Opera, where in 1961 she sang Katerina in the world premiere of Martinů's "The Greek Passion". They returned to the United States, and the Metropolitan Opera, in the 1960s. Her performances at the Met included Ulrica in Giuseppe Verdi's "Un ballo in maschera", Berta in "The Barber of Seville" by Gioachino Rossini, Marcellina in "The Marriage of Figaro", Maddalena in "Rigoletto" by Verdi and Erda in Richard Wagner's "Siegfried", totaling 172 performances. She sang the role of Delilah in "Samson and Delilah", with Richard Tucker performing as Samson. In her farewell performance in January 1972, Warfield
Robert Bruce (opera) Robert Bruce (opera) Robert Bruce is an 1846 pastiche opera in three acts, with music by Gioachino Rossini and Louis Niedermeyer to a French-language libretto by Alphonse Royer and Gustave Vaëz, after Walter Scott's "History of Scotland". The music was stitched together by Niedermeyer, with the composer's permission, with pieces from "La donna del lago", "Zelmira", and other Rossini operas. The work was premiered on 30 December 1846, by the Paris Opera at the Salle Le Peletier. The audience may not have noticed, but the orchestra included for the first time a recently invented instrument, which later came to be