In music, Op. 30 stands for Opus number 30. Compositions that are assigned this number include: * Beethoven – Violin Sonata No. 6 * Beethoven – Violin Sonata No. 7 * Beethoven – Violin Sonata No. 8 * Boccherini – Musica notturna delle strade di Madrid * Braunfels – Die Vögel * Chopin – Mazurkas, Op. 30 * Coleridge-Taylor – The Song of Hiawatha * Enescu – Piano Quartet No. 2 * Farrenc – Piano Quintet No. 1 * Franz – Anna Kraus * Górecki – Two Sacred Songs, Op. 30 * Hanson – Symphony No. 2 * Mendelssohn - Songs without Words, Book II * Myaskovsky – Symphony No. 10 * Rachmaninoff – Piano Concerto No. 3 * Rimsky-Korsakov – Piano Concerto * Saint-Saëns – La princesse jaune * Schumann – 3 Gedichte * Scriabin – Piano Sonata No. 4 * Sibelius – Islossningen i Uleå älv * Strauss