Boléro is a one-movement orchestral piece by the French composer Maurice Ravel (1875–1937). Originally composed as a ballet commissioned by Russian actress and dancer Ida Rubinstein, the piece, which premiered in 1928, is Ravel's most famous musical composition.

Before Boléro, Ravel had composed large-scale ballets (such as Daphnis et Chloé, composed for the Ballets Russes 1909–1912), suites for the ballet (such as the second orchestral version of Ma mère l'oye, 1912), and one-movement dance pieces (such as La valse, 1906–1920). Apart from such compositions intended for a staged dance performance, Ravel had demonstrated an interest in composing re-styled dances, from his earliest successes—the 1895 Menuet and the 1899 Pavane—to his more mature works like Le tombeau de Couperin, which takes the format of a dance suite.

Boléro epitomizes Ravel's preoccupation with restyling and reinventing dance movements. It was also one of the last pieces he composed before illness forced him into retirement. The two piano concertos and the song cycle Don Quichotte à Dulcinée were the only completed compositions that followed Boléro.

Premiere and early performances

The composition was a sensational success when it was premiered at the Paris Opéra on 22 November 1928, with choreography by Bronislava Nijinska and designs and scenario by Alexandre Benois. The orchestra of the Opéra was conducted by Walther Straram. Ernest Ansermet had originally been engaged to conduct during the entire ballet season, but the musicians refused to play under him. A scenario by Rubinstein and Nijinska was printed in the program for the premiere:

Inside a tavern in Spain, people dance beneath the brass lamp hung from the ceiling.  to the cheers to join in, the female dancer has leapt onto the long table and her steps become more and more animated.

Ravel himself, however, had a different conception of the work: his preferred stage design was of an open-air setting with a factory in the background, reflecting the mechanical nature of the music.

Boléro became Ravel's most famous composition, much to the surprise of the composer, who had predicted that most orchestras would refuse to play it. It is usually played as a purely orchestral work, only rarely being staged as a ballet. According to a possibly apocryphal story from the premiere performance, a woman was heard shouting that Ravel was mad. When told about this, Ravel is said to have remarked that she had understood the piece.

The piece was first published by the Parisian firm Durand in 1929. Arrangements of the piece were made for piano solo and piano duet (two people playing at one piano), and Ravel himself arranged a version for two pianos, published in 1930.

The first recording was made by Piero Coppolain Paris for the Gramophone Company on 8 January 1930. The recording session was attended by Ravel. The following day, Ravel conducted the Lamoureux Orchestra in his own recording for Polydor. That same year, further recordings were made by Serge Koussevitzky with the Boston Symphony Orchestra and Willem Mengelberg with the Concertgebouw Orchestra.