The turbulence of this period, with its strong anti-religious current, disturbed the serenity of this revered space.

By a Law of November 1789, all the property of the clergy, therefore of the Church, was nationalized and declared State property.
Under these provisions, a number of chapels were sold at auction and, as a result, disappeared forever.

As for Bellefontaine, the revolutionary authorities targeted first and foremost the small bell of the chapel, weighing 57 pounds, which was taken down from the bell tower, in accordance with an order of August 6, 1791.
It was then transported by horse-drawn cart to Aspach-le-Bas, which was a center for collecting metal objects of this nature, and from there taken to the Strasbourg Mint.

While people continued to anxiously wonder about the fate of the chapel itself, the municipality of Bréchaumont sent a request on February 1, 1792, to the Directory of the District of Belfort in order to obtain the maintenance of this sanctuary.

In this memorandum, it was argued in particular that this building was the work of the ancestors of the village, as a testimony to devotion to the Virgin Mary and that, as such, it should be considered communal property and that no other authority should be able to dispose of it.
It was all in vain, because on February 27, 1792, this request, bearing the signatures of Bihl, mayor, Johanès Blind and Joseph Jung, was rejected by an intransigent Directory.
This small religious building, confirmed as national property, was sold. From then on, and during the decades that followed, the chapel changed hands several times.

In 1795, when the authorities considered this pilgrimage to be definitively over, many faithful still came, even collectively, to visit the site and to pray there, which greatly displeased some 'patriots' (in the sense of extreme supporters of the Revolution) of Bréchaumont.
Following claims and complaints from the latter, a certain Mr. (or rather citizen) Hartmann, from Fontaine, was appointed commissioner in charge of investigating this matter.