title: Op. 31
text: # Op. 31
  
  In music, Op. 31 stands for Opus number 31. Compositions that are assigned this number include:
  
  * Alkan – Preludes, Op. 31
  * Barber – Summer Music
  * Beethoven – Piano Sonata No. 16
  * Beethoven – Piano Sonata No. 17
  * Beethoven – Piano Sonata No. 18
  * Britten – Serenade for Tenor, Horn and Strings
  * Chopin – Scherzo No. 2
  * Elgar – A Song of Flight
  * Elgar – After
  * Enescu – Vox Maris
  * Farrenc – Piano Quintet No. 2
  * Górecki – Symphony No. 2
  * Gottschalk – Souvenir de Porto Rico
  * Prokofiev – Tales of an Old Grandmother
  * Rachmaninoff – Liturgy of St. John Chrysostom
  * Saint-Saëns – Le rouet d'Omphale
  * Schillings – Mona Lisa
  * Schoenberg – Variations for Orchestra
  * Schumann – 3 Gesänge
  * Tchaikovsky – Marche slave
  * Vierne – Vingt-quatre pièces en style libre
  