Op. 1

In music, Op. 1 stands for Opus number 1. Compositions that are assigned this number include:


 * Bach – Partitas for keyboard
 * Bartók – Rhapsody
 * Beethoven – Piano Trios, Op. 1
 * Berg – Piano Sonata
 * Brahms – Piano Sonata No. 1
 * Chopin – Rondo in C minor
 * Clara Schumann – 4 Polonaises
 * Clifford – Symphony in E-flat
 * Dvořák – String Quintet No. 1 in A minor
 * Elgar – Romance for violin
 * Goeyvaerts – Sonata for Two Pianos
 * Mendelssohn – Piano Quartet No. 1
 * Michael Haydn – Symphony No. 27
 * Michael Haydn – Symphony No. 28
 * Michael Haydn – Symphony No. 29
 * Mozart – Violin Sonata No. 18
 * Mozart – Violin Sonata No. 19
 * Mozart – Violin Sonata No. 20
 * Prokofiev – Piano Sonata No. 1
 * Rachmaninoff – Piano Concerto No. 1
 * Schönberg – Zwei Gesänge
 * Schubert – Erlkönig
 * Schumann – Variations on the name "Abegg"
 * Shostakovich - Scherzo in F-sharp minor
 * Sibelius – Five Christmas Songs, collection of art songs (1897–1913)
 * Stamitz – Trios, Op. 1
 * J. Strauss I – Täuberln-Walzer
 * J. Strauss II – Sinngedichte
 * Stravinsky – Symphony in E-flat
 * Sullivan – The Tempest
 * Tchaikovsky – Scherzo à la russe
 * Turina – Piano Quintet
 * Vivaldi – Twelve Trio Sonatas, Op. 1
 * Waterhouse – String Sextet
 * Webern – Passacaglia for orchestra