Op. 21

In music, Op. 21 stands for Opus number 21. Compositions that are assigned this number include:


 * Barber – Capricorn Concerto
 * Beethoven – Symphony No. 1
 * Britten – Diversions for Piano Left Hand and Orchestra
 * Chopin – Piano Concerto No. 2
 * Dvořák – Piano Trio No. 1
 * Enescu – Symphony No. 3
 * Giraud – Pierrot lunaire
 * Graham – Episodes
 * Lalo – Symphonie espagnole
 * Larionov – Chout
 * Oswald – Cello Sonata No. 1
 * Ries – Cello Sonata No. 3
 * Sarasate – Spanish Dances, Book I
 * Schumann – Novelletten
 * Sibelius – "Hymn", song for male choir (1896, revised 1898)
 * Villiers – Elegiac Ode
 * Weill – Der Zar lässt sich photographieren