The house at Kloster 45 contains a piece of monastery history which is not immediately recognizable. It used to be a prison and, like many of the monastery’s buildings, was built in 1854 by the Mecklenburg-Strelitz master builder Friedrich Wilhelm Buttel. The original building plans have been preserved, so it is clear what the building originally looked like and how it was used. The overseer’s apartment was on the ground floor. This is still identifiable today by virtue of the normal-sized window.

On the other hand, the upper floor housed four prison cells. Each of these could be heated via a separate, partitioned room. These breech-loading furnaces were fired from the hallway. It is not known when the upper floor was converted for residential purposes, but the cell windows, which had been built in an elevated position in the walls, were lowered and enlarged. An original window opening of this cell floor remains preserved in one of the eaves. On the Old Town Island there are other historical prison cells, which have been preserved. These are in the attics of the town hall and the district court.

On the other hand, the upper floor housed four prison cells. Each of these could be heated via a separate, partitioned room. These breech-loading furnaces were fired from the hallway. It is not known when the upper floor was converted for residential purposes, but the cell windows, which had been built in an elevated position in the walls, were lowered and enlarged. An original window opening of this cell floor remains preserved in one of the eaves.

On the Old Town Island there are other historical prison cells, which have been preserved. These are in the attics of the town hall and the district court.