The opera Cavalleria rusticana by Pietro Mascagni, premieres at the Teatro Costanzi in Rome, beginning the verismo period in Italian opera.

Cavalleria rusticana is an opera in one act by Pietro Mascagni to an Italian libretto by Giovanni Targioni-Tozzetti and Guido Menasci, adapted from an 1880 short story of the same name and subsequent play by Giovanni Verga. Considered one of the classic verismo operas, it premiered on 17 May 1890 at the Teatro Costanzi in Rome. Since 1893, it has often been performed in a so-called Cav/Pag double-bill with Pagliacci by Ruggero Leoncavallo.

Pietro Mascagni was an Italian composer primarily known for his operas. His 1890 masterpiece Cavalleria rusticana caused one of the greatest sensations in opera history and single-handedly ushered in the Verismo movement in Italian dramatic music. While it was often held that Mascagni, like Ruggero Leoncavallo, was a "one-opera man" who could never repeat his first success, L'amico Fritz and Iris have remained in the repertoire in Europe since their premieres.

The Teatro dell'Opera di Roma is an opera house in Rome, Italy. Originally opened in November 1880 as the 2,212 seat Costanzi Theatre, it has undergone several changes of name as well modifications and improvements. The present house seats 1,560.

Rome is the capital city and most populated comune (municipality) of Italy. It is also the administrative centre of the Lazio region and of the Metropolitan City of Rome. A special comune named Roma Capitale with 2,746,984 residents in 1,287.36 km² (497.1 sq mi), Rome is the third most populous city in the European Union by population within city limits. The Metropolitan City of Rome Capital, with a population of 4,223,885 residents, is the most populous metropolitan city in Italy. Its metropolitan area is the third-most populous within Italy. Rome is located in the central-western portion of the Italian Peninsula, within Lazio (Latium), along the shores of the Tiber Valley. Vatican City is an independent country inside the city boundaries of Rome, the only existing example of a country within a city. Rome is often referred to as the City of Seven Hills due to its geography, and also as the "Eternal City". Rome is generally considered to be one of the cradles of Western civilization and Western Christian culture, and the centre of the Catholic Church.