In music, Op. 63 stands for Opus number 63. Compositions that are assigned this number include:
Alkan – Esquisses Arnold – Symphony No. 3 Britten – Missa Brevis Bruch – Swedish Dances Chopin – Mazurkas, Op. 63 Elgar – Symphony No. 2 Lyapunov – Piano Sextet Prokofiev – Violin Concerto No. 2 Schumann – Piano Trio No. 1 Shostakovich – The Gamblers Sibelius – Symphony No. 4 in A minor (1911) Strauss – Josephslegende Weber – Trio for Piano, Flute and Cello