The STUMM family stands alongside Schnitger and Silbermann as one of Germany's most famous organ-building dynasties. It was founded by Johann Michael STUMM. He and five generations of his descendants built some 400 organs between Cologne and Karlsruhe, Luxemburg and Amorbach - a tradition unique in the history of German organ building. The oldest surviving organ by Johann Michael STUMM, in the Lutheran church in Rhaunen, dates from 1723. The latest findings show that it was built as early as 1715 - with Johann Michael working alongside his instructor Otto Reinhard Metzenius. The last instrument from the Sulzbach workshop was built for Niederhosenbach in 1895. The sixth generation of the organ-building dynasty includes Gustav STUMM, who had his last workshop in Kirn in the Rhineland-Palatinate. That was where he built the organ for the Catholic church in Rhaunen in 1893. He died in 1906, his final work for Traisen left unfinished.