Fischer's contribution to the design of the abbey church are still controversial. The original drafts cannot be attributed to Fischer directly due their containing numerous errors and inaccuracies which implies that the existing drafts were inspired by Fischer but not drawn by him. The sketches must have been drawn by one of his successors after Fischer's departure in 1757. It is possible that the sketches were made either by Johann Wiedemann or his son Dominikus Wiedemann who worked with Balthasar Neumann at Neresheim Abbey from where the drafts were later moved to the central archive of the Princes of Thurn und Taxis in Regensburg.