Glenn Herbert Gould (25 September 1932 – 4 October 1982) was a Canadian pianist who became one of the best-known and most celebrated classical pianists of the 20th century. He was particularly renowned as an interpreter of the keyboard music of Johann Sebastian Bach. His playing was distinguished by remarkable technical proficiency and capacity to articulate the polyphonic texture of Bach's music.

After his adolescence, Gould rejected most of the standard Romantic piano literature including Liszt, Schumann, and Chopin. Although his recordings were dominated by Bach, Gould's repertoire was diverse, including works by Beethoven, Mozart, Haydn, Brahms, pre-Baroque composers such as Jan Pieterszoon Sweelinck, Orlando Gibbons and William Byrd, and such 20th-century composers as Paul Hindemith, Arnold Schoenberg and Richard Strauss. Gould was well known for various eccentricities, from his unorthodox musical interpretations and mannerisms at the keyboard to aspects of his lifestyle and personal behaviour. He stopped giving concerts at the age of 31 to concentrate on studio recording and other projects. Gould was the first pianist to record any of Liszt's piano transcriptions of Beethoven's symphonies (beginning with the Fifth Symphony, in 1967).