In 1608, on the Vigil of the Feast of Pentecost, the monks decided to prepare an altar for the exposition and adoration of the Blessed Sacrament. The lunette of the monstrance was very large, and because of this, they decided to put in two Hosts. When Vespers had finished the monks left the monstrance exposed on the provisional altar. On the next morning, the sacristan opened the church and found it full of smoke, with the provisional altar completely reduced to ashes.
He started to yell, and immediately the religious and other people hastened and proceeded to remove the ashes with the hope of finding some part of the monstrance. When the smoke began to clear, they were astonished on seeing that the monstrance was suspended in the air.
The multitude increased and crowded to see the Eucharistic marvel, in which the Hosts had remained unharmed regardless of the fire. The religious were astonished and unable to make a decision. They asked the counsel of the Capuchin friars of Vesoul. The friars immediately prepared a new altar over the burned one and celebrated Holy Mass.