The Abbey of Munster, also known as Saint Gregory's Abbey was founded around 660. Its purpose was to promote Christianity in the region, which had been in decline since the fall of the Western Roman Empire. It thrived with the support of the Frankish kings, particularly Childeric II and Louis the Pious. Over time, the abbey faced conflicts with the bishops of Basel, Strasbourg, and the emperors of the Holy Roman Empire.
As the region largely turned to Protestantism, the abbey's influence waned. It experienced a revival under Louis XIV, who sent French monks to restore and rebuild the dilapidated buildings. During the 18th century, the abbey became an important regional intellectual center, with figures like Abbot Charles Marchant and theologian Augustin Calmet passing through.
However, the French Revolution led to the dissolution of the abbey and the confiscation and sale of its assets. Some of the convent buildings, including the abbey church, were destroyed in the years following the Revolution, while the rest were converted into a textile factory by the industrialist André Hartmann. This factory was also destroyed during World War I, leaving only the abbot's residence and some cloister ruins.
References:Saint-Georges de Boscherville Abbey is a former Benedictine abbey. It was founded in about 1113 by Guillaume de Tancarville on the site of an earlier establishment of secular canons and settled by monks from the Abbey of Saint-Evroul. The abbey church made of Caumont stone was erected from 1113 to 1140. The Norman builders aimed to have very well-lit naves and they did this by means of tall, large windows, initially made possible by a wooden ceiling, which prevented uplift, although this was replaced by a Gothic vault in the 13th century. The chapter room was built after the abbey church and dates from the last quarter of the 12th century.
The arrival of the Maurist monks in 1659, after the disasters of the Wars of Religion, helped to get the abbey back on a firmer spiritual, architectural and economic footing. They erected a large monastic building one wing of which fitted tightly around the chapter house (which was otherwise left as it was).