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
William Tell (opera) William Tell (opera) Guillaume Tell (, ) is a French-language opera in four acts by Italian composer Gioachino Rossini to a libretto by Victor-Joseph Étienne de Jouy and L. F. Bis, based on Friedrich Schiller's play "William Tell," which, in turn, drew on the William Tell legend. The opera was Rossini's last, although he lived for nearly 40 more years. Fabio Luisi said that Rossini planned for "William Tell" to be his last opera even as he composed it. The often-performed overture in four sections features a depiction of a storm and a vivacious finale, the "March of the Swiss