Complex sentence: The Hofkirche organ and that of Freiberg Cathedral are his greatest works; the latter has three manuals and 41 stops divided between "Oberwerk", "Hauptwerk", "Brustwerk" and Pedal.
Split into simpler sentences: The Hofkirche organ and that of Freiberg Cathedral are considered his greatest works. The organ in Freiburg Cathedral has three manuals and 41 stops divided between "Oberwerk", "Hauptwerk", "Brustwerk" and Pedal.