Sigfrid Karg-Elert (born Oberndorf am Neckar, 21 November 1877; died Leipzig, 9 April 1933) was a German composer. He wrote in a late Romantic style. He is mainly remembered for his music for organ and harmonium, his favourite instrument. He wrote a set of 66 Chorale improvisations for organ, the best known of which is called "Nun danket alle Gott" ("Now thank we all our God").