Giacomo Puccini's Tosca opens in Rome.

Giacomo Puccini was an Italian composer known primarily for his operas. Regarded as the greatest and most successful proponent of Italian opera after Verdi, he was descended from a long line of composers, stemming from the late Baroque era. Though his early work was firmly rooted in traditional late-nineteenth-century Romantic Italian opera, it later developed in the realistic verismo style, of which he became one of the leading exponents.

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.

January 14 is the 14th day of the year in the Gregorian calendar; 351 days remain until the end of the year.