In the side aisle, valuable medieval tomb stones of abbots have been arranged as a new display in 2004 and 2005. These tomb stones were originally in the crossing. After the reformation they were moved and set into the church floor. During the late 19th century the master builder Möckel removed them from the church floor and integrated them into the side walls. They were removed from the side walls, desalinated, restored and set, at a distance, against the walls, permitting a constant flow of air to avoid further damage. The tomb stones are now placed as follows: to the right side the two nameless abbots, followed by the abbots Martin I. (died 1339), Jakob (died 1361), Martin II. (died 1391), Johannes Plate (died 1420) as well as the vicar von Neuburg, Hermann von Giwertze (died 1449); to the left the abbots Gottschalk (died 1391), Hermann Bockholt (died 1423), Bernhard (died 1441), Johannes Wilkens (died 1489), Franz Meyne (died 1499) and Heinrich Mützel (died 1504). 