Arpeggione or guitar “da gamba”

This instrument is also called cello-guitar or guitar di borbone…

Having no endpin, unlike cello (but of course I can put one if you wish), the arpeggione has to be played holding it between the knees. This instrument was invented by the instrument-maker Johann Georg Staufer in 1823, as a declined model of a guitar. In the “Arpeggione” sonata by Franz Schubert (D821), the arpeggione part is nowadays often played with arrangements for various instruments, like cello, alto cello, double bass and guitar.