Friedrich Ladegast (1818–1905), a German organ builder of European repute, followed Romantic trends and worked in the town of Weissenfels from 1846. With four manuals and 81 stops, his 1855 organ in the Merseburg Cathedral was the largest in Germany, and it was used by Liszt {see planet  (3910)} in composing his prelude and fugue on B-A-C-H. (M 45750) _ _.