Monks coming from Landevennec, in Britany, founded the abbey of St. Saulve in the early 10th century.
The church, which is used to be a Benedictine church, was reduced to half its original size as a result of the 1537 sacking.
Under
the church organ lie two funerary effigies from the 13th century. The front and the entrance to the left hand side aisle dates back to the 13th century.
Sacred art is everywhere to be seen in Montreuil.
The quality of the furniture of the town churches,
as well as the wealth of the Saint-Saulve and the Hotel-Dieu treasuriesare evidence of an ostentations religious past.
One of the oldest abbey crosses in Europe is the most beautiful piece of sacred art in the Northern France.