In between Die schweigsame Frau and La straniera which one is an opera in three acts?
La straniera: La straniera ("The Foreign Woman") is an opera in two acts with music by Vincenzo Bellini to an Italian libretto by Felice Romani, based on the novel "L'Étrangère" (2 vols, 1825) by Charles-Victor Prévot, vicomte d'Arlincourt, although writer Herbert Weinstock also adds that it is "more likely [based on] a dramatization of [that novel] in Italian by Giovan Carlo, barone di Cosenza" since he then quotes a letter from Bellini to his friend Francesco Florimo in which he says that Romani "certainly will not follow the play" [suggesting then that they were aware of its existence.]
i don't know