In music, Op. 44 stands for Opus number 44. Compositions that are assigned this number include:

Beethoven – Variations on an original theme in E-flat major Britten – Spring Symphony Bruch – Violin Concerto No. 2 Busoni – Indian Fantasy Chopin – Polonaise in F-sharp minor, Op. 44 Danzi – Horn Sonata No. 2 Dvořák – Serenade for Wind Instruments Elgar – Coronation Ode Ginastera – Popol Vuh Goehr – Behold the Sun Górecki – Miserere Mendelssohn – String Quartet No. 3 Mendelssohn – String Quartet No. 4 Mendelssohn – String Quartet No. 5 Nielsen – String Quartet No. 4 Oswald – Cello Sonata No. 2 Prokofiev – Symphony No. 3 Rachmaninoff – Symphony No. 3 Saint-Saëns – Piano Concerto No. 4 Schumann – Piano Quintet Sibelius – , concert piece for orchestra from the theatre score (1903, revised 1904) Strauss – Notturno Tchaikovsky – Piano Concerto No. 2