Claim: Nikolaus Weigel converted a folk instrument into the concert Zither and his ideas were immediately accepted.
Evidence: In 1838, Nikolaus Weigel of Munich conceived the idea of adopting fixed bridges, adding additional strings, tuning them in the cycle of fifths, and chromatically fretting the fingerboard – effectively converting a rather crude folk instrument into the concert zither. His ideas were not, however, widely accepted until 1862, when luthier Max Amberger of Munich fabricated a new zither based on Weigel's design.