Behind the altar, there is the monastic choir in walnut, with two levels; in the center, there is the prior’s stall with the inlaid emblem of St. Catherine (the pierced heart) and, above, the panel with the date 1754. It was already listed in the inventory of 1805, which reads: “of elegantly worked walnut, with seventeen seats for the choir nuns and as many for the second order of lay sisters and tertiaries.”