Reservoir and Chateau d'eau

Water from the Sainte-Geneviève aqueduct entered the abbey precincts by means of a thirteenth-century reservoir tower located on the southern flank of the precinct wall. Foundations of the medieval tower and the stone trough for its ingress pipe were revealed by excavation.

Following the Huguenot sack of the abbey in 1567, the reservoir was replaced by a seventeenth-century château d'eau, that provided increased pressure for the driving of the jets d'eau in the Gothic cloister and the cemetery garden.