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
Gioachino Rossini was in many of its incidents an anticipation of those presented to the world a few years later in Sir Walter Scott's "Kenilworth". The opera was the first in which Rossini wrote out the ornaments of the arias instead of leaving them to the fancy of the singers, and also the first in which the "secco" recitative was replaced by a recitative accompanied by a string quartet. Rossini's most famous opera was produced on 20 February 1816, at the Teatro Argentina in Rome. The libretto, a version of Beaumarchais' stage play "Le Barbier de Séville", was newly written by Cesare