In music, Op. 7 stands for Opus number 7. Compositions that are assigned this number include:Barber – Music for a Scene from Shelley Beethoven – Piano Sonata No. 4 Berlioz – Les nuits d'été Chopin – Mazurkas, Op. 7 Clara Schumann – Piano Concerto Enescu – Octet Grieg – Piano Sonata Haas – String Quartet No. 2 Handel – Organ concertos, Op. 7 Jäger – Der Tod und das Mädchen Korngold – Der Ring des Polykrates Leifs – Organ Concerto Nielsen – Symphony No. 1 Paganini – Violin Concerto No. 2 Rachmaninoff – The Rock Schoenberg – String Quartets Schumann – Toccata Schütz – Musikalische Exequien Sibelius – Kullervo, choral symphony (1892) Stravinsky – Quatre études, Op. 7 Vivaldi – Twelve Concertos, Op. 7 Wagner – Schwarzschwanenreich