The prison has four identical 12m2 cells. Each cell has a latrine. Criminals were locked up here by decision of the abbot who exercised justice for minor crimes committed on the lands of the abbey by monks and lay workers. The prisoners were notably thieves, fugitives, violent or even promiscuous people. The famous writer Victor Hugo described the cells of the abbey prison in his book “Les Misérables”, thus recalling his position against the death penalty.