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
See also Opus One (disambiguation) OP1 (disambiguation)