In music, Op. 77 stands for Opus number 77. Compositions that are assigned this number include:
Arnold – Concerto for Two Violins and String Orchestra Beethoven - Fantasia for Piano (1809) Brahms – Violin Concerto Britten – The Burning Fiery Furnace Dvořák – String Quintet No. 2 Elgar – Une voix dans le désert Glazunov – Symphony No. 7 Haydn, Franz - String Quartets Opus 77 (“Lobkowitz”) Krenek – Cefalo e Procri Schubert - Valses Nobles Schumann – Lieder und Gesänge volume III (5 songs) Shostakovich – Violin Concerto No. 1 Sibelius – Two Serious Melodies, concertante works for violin (or cello) and orchestra (1914–1915, arranged 1916) Tchaikovsky – Fatum