Op. 104

In music, Op. 104 stands for Opus number 104. Compositions that are assigned this number include:


 * Beethoven – String Quintet, Op. 104
 * Brahms – Fünf Gesänge, Op. 104
 * Schumann – 7 Lieder
 * Sibelius – Symphony No. 6 in D minor (1923)