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 matrimonio" ("The Marriage Contract"), was produced at Venice when he was a youth of 18 years. Two years before this he had already received the prize at the Conservatorio of Bologna for his cantata "Il pianto d'Armonia sulla morte d'Orfeo". Between 1810 and 1813 at Bologna, Rome, Venice and Milan, Rossini produced operas of varying success, most notably "La pietra del paragone" and "Il signor Bruschino", with its brilliant and unique overture. In 1813, "Tancredi" and "L'italiana in Algeri" were even bigger successes, and catapulted the 20-year-old composer to international fame. The libretto for "Tancredi" was an arrangement by Gaetano