
A little further down is a large quadrangular pump. Its deep well was dug around 1510 and was the most important in the fortress. The large limestone stone bears the inscription "le 20 8bre 1791", the date of the inauguration of this monument, which replaced an older one. The importance of water in the event of a siege should not be overlooked. All the inhabitants had at their disposal were wells dug into the schist. Near this pump once stood the Limbourg perron (a tall column surmounted by a lion) and the justice tree.