By the sixteenth century a combined string and organ keyboard instrument had come into existence. The term claviorganum covered a wide variety of instruments: a clavichord with pipes underneath, a small 4' spinet with a built-in organ, an 8' spinet with organ, a one or two-manual harpsichord with a chest-like or harpsichord-shaped chamber organ underneath, and in 1657 Caspar Schott even described a Geigenwerk with a build-in organ. In Italy, Austria, Germany, England and France, claviorgana were made until the late eighteenth century.

This claviorganum comes from the workshop of Matthias Griewisch (harpsichord) and Friedrich Lieb (organ). It is composed of an Italian one-manual harpsichord after Aelpidio Gregori, and a chest organ with 8' Gedackt and 4' Flute stops. By shifting the keyboard the harpsichord and the organ may be played separately or together.

Claviorganum German/Italian hpschd. 8'8' organ 8'4' C-d'''