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").