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

• OP1 (disambiguation)

Topics referred to by the same term

This disambiguation page lists compositions catalogued to the same opus number.
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