Chapel of the Oratory
In 1475, King Louis XI founded the parish of Conception Notre-Dame en Passais. Already at that time, the site of the present chapel was called "l'Oratoire", i.e. the place of prayer. In 1852, a lady from Passais fell seriously ill; she made a vow: if she recovered, she would build a chapel in honour of Our Lady. She was cured and fulfilled her promise, a building of a few square meters.
About this building
As more and more pilgrims came, another chapel was built in 1857. This chapel proved to be too small to accommodate the pilgrims, especially in the month of May. In 1914, a third chapel was planned. With the war, the project was postponed and was carried out from 1924 to 1927 thanks to a missionary "Father Bignon".