Teatro dell'Opera di Roma in the context of Cavalleria rusticana

Tosca is an opera in three acts by Giacomo Puccini to an Italian libretto by Luigi Illica and Giuseppe Giacosa. It premiered at the Teatro Costanzi in Rome on 14 January 1900. The work, based on Victorien Sardou's 1887 French-language dramatic play, La Tosca, is a melodramatic piece set in Rome in June 1800, with the Kingdom of Naples's control of Rome threatened by Napoleon's invasion of Italy. It contains depictions of torture, murder, and suicide, as well as some of Puccini's best-known lyrical arias.

Puccini saw Sardou's play when it was touring Italy in 1889 and, after some vacillation, obtained the rights to turn the work into an opera in 1895. Turning the wordy French play into a succinct Italian opera took four years, during which the composer repeatedly argued with his librettists and publisher. Tosca premiered at a time of unrest in Rome, and its first performance was delayed for a day for fear of disturbances. Despite indifferent reviews from the critics, the opera was an immediate success with the public.

The Viminal Hill (/ˈvɪmɪnəl/ VIM-in-əl; Latin: Collis Vīminālis [ˈkɔllɪs wiːmɪˈnaːlɪs]; Italian: Viminale [vimiˈnaːle]) is the smallest of the famous Seven Hills of Rome. A finger-shape cusp pointing toward central Rome between the Quirinal Hill to the northwest and the Esquiline Hill to the southeast, it is home to the Teatro dell'Opera and the Termini Railway Station.

At the top of the Viminal Hill is the Palace of Viminale that hosts the headquarters of the Ministry of the Interior; currently the term Il Viminale means the Ministry of the Interior.