The abbey belonged to the Order of Canons Regular of Prémontré[1] which owned land in the village of Posat.

The original chapel of Posat was built in the same period than the convent; it was destroyed, then re-built and consecrated in 1675[1] by the Jesuits.

[2] Dedicated to the Virgin Mary, it became a pilgrimage site in the 18th century:[2] the worshippers came there to pray in front of a statue described as "miraculous yet fully worm-eaten".

The table of the main altar (Visitation), as well as the four other paintings of the choir and the ten others of the nave, show the mysteries of the Holy Rosary.

The tabernacle, made of carved golden wood, was donated by the court of Louis XV to the Jesuit Fathers.