information:classification, quality:correction
Late period

Chusid notes Strepponi's description of the operas of the 1860s and 1870s as being "modern" whereas Verdi described the pre-1849 works as "the cavatina operas", as further indication that "Verdi became increasingly dissatisfied with the older, familiar conventions of his predecessors that he had adopted at the outset of his career," Parker sees a physical differentiation of the operas from Les vêpres siciliennes (1855) to Aida (1871) is that they are significantly longer, and with larger cast-lists, than previous works. They also reflect a shift towards the French genre of grand opera, notable in more colourful orchestration, counterpointing of serious and comic scenes, and greater spectacle. The opportunities of transforming Italian opera by utilising such resources appealed to him. For a commission from the Paris Opéra he expressly demanded a libretto from Eugène Scribe, the favourite librettist of Meyerbeer, telling him: "I want—in fact, I must have—a grandiose, impassioned and original subject." The result was Les vêpres siciliennes, and the scenarios of Simon Boccanegra (1857), Un ballo in maschera (1859), La forza del destino (1862), Don Carlos (1867) and Aida (1871) all meet the same criteria. Porter notes that Un ballo marks an almost complete synthesis of Verdi's style with the grand opera hallmarks, such that "huge spectacle is not mere decoration but essential to the drama...musical and theatrical lines remain taut the characters still sing as warmly, passionately and personally as in Il trovatore."

When the composer Ferdinand Hiller asked Verdi whether he preferred Aida or Don Carlos, Verdi replied that Aida had "more bite and (if you'll forgive the word), more theatricality ". During the rehearsals for the Naples production of Aida Verdi amused himself by writing his only string quartet, a sprightly work which shows in its last movement that he had not lost the skill for fugue-writing that he had learned with Lavigna.