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. The opera premiered more than three years after Gilbert and Sullivan's only previous collaboration, Thespis, an 1871–72 Christmas season entertainment. In the intervening years, both the author and composer were busy with separate projects. Beginning in 1873, Gilbert tried several times to get the opera produced before the impresario Richard D'Oyly Carte suggested that he collaborate on it with Sullivan. Sullivan was pleased with the piece and promptly wrote the music. Critics and audiences praised how well Sullivan's witty and good-humoured music complemented Gilbert's satire. The success of Trial by Jury launched the famous series of 13 collaborative works between Gilbert and Sullivan that came to be known as the Savoy Operas.