Gluck finally estabilished an indissoluble link between music and words, with music becoming the main element for the success of an opera. As in the striking aria “What shall I do without Euridice?”. It is through to the incomparable beauty and expressiveness of the melody sung by Orpheus that Love is presuaded to bring Euridice back to life.
La Sonnambula was a complete triumph, since its premiere. The newspapers wrote of “a melody that goes to the heart, an instrumentation always beautiful and well built” and reported of “endless applauses”. The story revolves around the character of Amina, the archetypal of the slandered innocent.
La Serva Padrona, composed on a libretto by Gennaro Antonio Federico in 1733, is an intermezzo divided into two interludes. It was originally designed to be performed between the acts of the opera seria Il prigioniero superbo by Pergolesi himself, staged at the Teatro San Bartolomeo in Naples on the occasion of the birthday of the empress Elisabeth Christine of Brunswick, wife of the emperor Charles VI and mother of the empress Marie Therese of Augsburg. That very same libretto had been used by almost every composer in Naples and therefore was already popular in a number of successful versions. The definition of believable characters and the solid realism of the short story, revolving almost entirely around the characters’ psychology made of the libretto a success. Pergolesi’s genius turned it into a masterpiece.