 Some early 17th century illustrations of citterns have body shapes resembling this instrument, while the Swiss halszither - a traditional regional cittern that survived until the present, has also been constructed with a similar body.Plate 5 of the "Sciagraphia" illustrates a "Gross Sechs Chörichte Cither"; (large six course cittern) - depicted with eight pegs inserted into the sides of the pegbox and six strings.Like the cittern, the ceterone was also built with a flat-backed body in teardrop shape, with a single large 'rose', and had fixed, metal frets (unlike the tied, gut frets of the lute family) and used metal strings.