Il trovatore ('The Troubadour') is an opera in four acts by Giuseppe Verdi to an Italian libretto largely written by Salvadore Cammarano, based on the play El trovador (1836) by Antonio Garca Gutirrez. It was Gutirrez's most successful play, one which Verdi scholar Julian Budden describes as "a high flown, sprawling melodrama flamboyantly defiant of the Aristotelian unities, packed with all manner of fantastic and bizarre incident."The premiere took place at the Teatro Apollo in Rome on 19 January 1853, where it "began a victorious march throughout the operatic world," a success due to Verdi's work over the previous three years. It began with his January 1850 approach to Cammarano with the idea of Il trovatore. There followed, slowly and with interruptions, the preparation of the libretto, first by Cammarano until his death in mid-1852 and then with the young librettist Leone Emanuele Bardare, which gave the composer the opportunity to propose significant revisions, which were accomplished under his direction. These revisions are seen largely in the expansion of the role of Leonora.

For Verdi, the three years were filled with musical activity; work on this opera did not proceed while the composer wrote and premiered Rigoletto in Venice in March 1851. His personal affairs also limited his professional work. In May 1851, an additional commission was offered by the Venice company after Rigoletto's success there. Another commission came from Paris while he was visiting that city from late 1851 to March 1852. Before the libretto for Il trovatore was completed, before it was scored, and before it premiered, Verdi had four operatic projects in various stages of development.

Today, Il trovatore is performed frequently and is a staple of the standard operatic repertoire.

Giuseppe Fortunino Francesco Verdi (Italian: [dʒuˈzɛppe ˈverdi]; 9 or 10 October 1813 – 27 January 1901) was an Italian composer best known for his operas. He was born near Busseto to a provincial family of moderate means, receiving a musical education with the help of a local patron. Verdi came to dominate the Italian opera scene after the era of Gioachino Rossini, Gaetano Donizetti, and Vincenzo Bellini, whose works significantly influenced him.

In his early operas, Verdi demonstrated a sympathy with the Risorgimento movement which sought the unification of Italy. He also participated briefly as an elected politician. The chorus "Va, pensiero" from his early opera Nabucco (1842), and similar choruses in later operas, were much in the spirit of the unification movement, and the composer himself became esteemed as a representative of these ideals. An intensely private person, Verdi did not seek to ingratiate himself with popular movements. As he became professionally successful he was able to reduce his operatic workload and sought to establish himself as a landowner in his native region. He surprised the musical world by returning, after his success with the opera Aida (1871), with three late masterpieces: his Requiem (1874), and the operas Otello (1887) and Falstaff (1893).

His operas remain extremely popular, especially the three peaks of his 'middle period': Rigoletto, Il trovatore and La traviata. The bicentenary of his birth in 2013 was widely celebrated in broadcasts and performances.