La sonnambula used themes from a Vincenzo Bellini opera that had a libretto by whom?
La sonnambula (Balanchine) La sonnambula "(The Sleepwalker)" is a ballet by the co-founder and ballet master of New York City Ballet, George Balanchine, made to Vittorio Rieti's music using themes from the operas of Vincenzo Bellini including "La Sonnambula", "Norma", "I Puritani" and "I Capuleti e i Montecchi" (1830–35) and with costumes by Karinska. The premiere took place with the Ballet Russe de Monte Carlo on Wednesday, 27 February , at City Center of Music and Drama, New York; the City Ballet premiere was on 6 January 1965.
Belfagor Belfagor (premiere 26 April 1923) is an Italian-language opera by the composer Ottorino Respighi to a libretto by Claudio Guastalla (1880-1948) based on the comedy "Belfagor" of Ercole Luigi Morselli (1882-1921), itself loosely based on the novella "Belfagor arcidiavolo" by Niccolò Machiavelli. It was premiered in 1923 at La Scala in Milan, under the baton of Antonio Guarnieri, since Toscanini was unavailable. The cast featured Irish soprano Margaret Burke Sheridan as Candida, tenor Mariano Stabile as her lover Baldo, and baritone Francesco Merli as the titular Belfagor, a "arcidiavolo" who tries to marry a human maiden while in disguise as a nobleman, using gifts of money to her father.