A cellone is a large cello invented in 1882 by the German luthier Alfred Stelzner. It is held like a cello but tuned to E A D G, a fourth below the cello and two octaves below the violin. Its music is written in the bass clef. Its body length and its breadth slightly exceeds those of a normal cello, but it sounds much deeper than a normal cello.
- "Dr. Alfred Stelzner: Pioneer in Violin Acoustics". Draeseke.org. Retrieved 2014-01-18.
- "Bassetto historisch - Cellone und Sous-Basse". Silvio Dalla Torre. Retrieved 2014-01-18.
- "AK Coburg Recordings - Music of Draeseke - release DR 0010". Draeseke.org. Retrieved 2014-01-18.
- 2005: Homage to Stelzner. CD. AK Coburg DR 0010. (Contains music by Felix Draeseke and Arnold Krug)