A cellone is a large cello invented in 1882 by the German luthier Alfred Stelzner.
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.
One of the few works where it is used is the Sextet in D major for violino piccolo, violin, viola, violotta, cello, and cellone, Op.
This article relating to cellos is a stub.