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 appearance as a singer. He was also a capable horn player, treading in the footsteps of his father. Around this time, he composed individual numbers to a libretto by Vincenza Mombelli called "Demetrio e Polibio", which was handed to the boy in pieces. Though it was Rossini's first opera, written when he was thirteen or fourteen, the work was not staged until the composer was twenty years old, premiering as his sixth official opera. In 1806, Rossini became a cello student under Cavedagni at the Conservatorio di Bologna. The following year he was admitted to the counterpoint class of Padre