"Tosca" is an opera composed by Giacomo Puccini. It premiered in 1900 and is set in the city of Rome during the year 1800. The opera tells the story of the singer Floria Tosca and her lover, the painter Mario Cavaradossi, who become entangled in a political and intrigue plot. The opera is known for its thrilling music and for exploring themes such as love, betrayal, and power.