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