In music, Op. 11 stands for Opus number 11. Compositions that are assigned this number include: Barber – Adagio for Strings Barber – String Quartet Beethoven – Piano Trio, Op. 11 Boccherini – String Quintet in E major, Op. 11, No. 5 Brahms – Serenade No. 1 Chopin – Piano Concerto No. 1 Dvořák – Romance in F minor Elgar – Sursum corda Enescu – Romanian Rhapsodies Fanny Hensel – Piano Trio Gottschalk – Le Mancenillier Granados – Goyescas Grieg – In Autumn Hindemith – Viola Sonata No. 1 Hindemith – Violin Sonata No. 2 Karłowicz – Lithuanian Rhapsody Mendelssohn – Symphony No. 1 Prokofiev – Toccata Racine – Cantique de Jean Racine Schoenberg – Drei Klavierstücke Schumann – Piano Sonata No. 1 Scriabin – 24 Preludes, Op. 11 Sibelius – Karelia Suite, for orchestra (1893) Siegfried Wagner – An allem ist Hütchen schuld! Spohr – String Quartet No. 3 Stamitz – Symphony in E-flat major, Op. 11, No. 3 Stanford – Violin Sonata No. 1 Strauss – Horn Concerto No. 1 Tchaikovsky – String Quartet No. 1 Vivaldi – Six Concertos, Op. 11 Zemlinsky – Der Traumgörge