Gianni Schicchi (Italian pronunciation: [ˈdʒanni ˈskikki]) is a comic opera in one act by Giacomo Puccini to an Italian libretto by Giovacchino Forzano, composed in 1917–18. The libretto is based on an incident mentioned in Dante's Divine Comedy. The work is the third and final part of Puccini's Il trittico (The Triptych)—three one-act operas with contrasting themes, originally written to be presented together. Although it continues to be performed with one or both of the other trittico operas, Gianni Schicchi is now more frequently staged either alone or with short operas by other composers. The aria "O mio babbino caro" is one of Puccini's best known, and one of the most popular arias in opera.

Trial by Jury is a comic opera in one act, with music by Arthur Sullivan and libretto by W. S. Gilbert. It was first produced on 25 March 1875, at London's Royalty Theatre, where it initially ran for 131 performances and was considered a hit, receiving critical praise and outrunning its popular companion piece, Jacques Offenbach's La Périchole. The story concerns a "breach of promise of marriage" lawsuit in which the judge and legal system are the objects of lighthearted satire. Gilbert based the libretto of Trial by Jury on an operetta parody that he had written in 1868.