In 1804, Fontevraud reached a turning point as it was transformed into a prison by Napoleonic decree. The transition required 10 years of changes, the time needed to build the various workshops, before the first prisoners - men, women and children - finally arrived in 1814. In 1850, the women were transferred to the prison in Rennes and the children to Roiffé.
The prisoners carried out sentences of forced labor: textile work, weaving, chair making, cabinetry, handling and carding of raw wool, pearl button and slipper manufacturing... prisoners worked from 8h to 11h30, and then from 14h to 17h30. Silence was fully enforced, the only words allowed being the ones relating to the tasks.
There were also the "unoccupied", prisoners that were unable to work because they were too old, sick, crippled or mentally ill... They remained seated on benches and listened to a prisoner reading, or walked around in an exercise yard at the pace set by a provost.
The prison finally closed its doors in 1963, though the prisoners remained in the Royal Abbey until 1985.