German composer. He probably received his first lesson from Bach when the latter was organist in the New Church at Arnstadt from 1704 to 1707. Later he studied the organ with Bach at Weimar. Forkel tells us that the maestro considered him an excellent virtuoso. He remained at Weimar until his death. In order to retain him, Duke Ernst August appointed him deputy Burgomaster of the town. He left a collection of chorales which have become extremely rare. His talent can be judged from the fine chorale Jesu Leiden, Pein und Tod published under the name of Bach in Volume 9 of Johann Sebastian's organ works (Peters edition).