In music, Op. 26 stands for Opus number 26. Compositions that are assigned this number include:
Barber – Piano Sonata Beethoven – Piano Sonata No. 12 Brahms – Piano Quartet No. 2 Bruch – Violin Concerto No. 1 Chopin – Polonaises, Op. 26 Dvořák – Piano Trio No. 2 Enescu – Cello Sonata No. 2 Ernst – Grand Caprice on "Erlkönig" Goldmark – Rustic Wedding Symphony Kabalevsky – The Comedians Mendelssohn – The Hebrides Myaskovsky – Symphony No. 8 Oswald – Piano Quartet No. 2 Prokofiev – Piano Concerto No. 3 Sarasate – Spanish Dances, Book IV Schoenberg – Wind Quintet Schumann – Faschingsschwank aus Wien Scriabin – Symphony No. 1 Sibelius – Finlandia, tone poem for orchestra (1899, revised 1900) Spohr – Clarinet Concerto No. 1 Tchaikovsky – Sérénade mélancolique Waterhouse – Piccolo Quintet Weber – Concertino for Clarinet