Grestain Abbey (Abbaye Notre-Dame de Grestain) was an 11th century Benedictine monastery. Closely associated with the family of William, Duke of Normandy, the abbey was instrumental in the Normans taking control over the Catholic Church in England in the centuries following the Norman Conquest of England, establishing new churches and priories in England, and Abbots of Grestain ordained many English priests. Many churches mentioned in the Domesday Book cite Grestain as the founding establishment.
The Abbey was founded in 1050 by Herluin de Conteville and his wife Arlette, mother of William the Conqueror. Herluin, a victim of leprosy, was said to have seen a vision of the Blessed Virgin Mary who told him to take a spa treatment at the source of the Carbec stream in Grestain (Carbec meaning 'the Stream of Kari'). Cured, he decided to build an abbey in the nearby Valley of Vilaine dedicated to the Virgin and a chapel at Carbec, a site also dedicated to the healing spring of Saint-Méen. Herluin's son, Robert de Mortain, half-brother of William, was the principal benefactor, endowing it with his revenues from England.
In 1358, the abbey was sacked by the Anglo-Navarrais. The monks took refuge at their safe house in Rouen, in the parish of Saint-Eloi. Between 1364-1365 the abbey was attacked once more. On the return of the monks, the abbey had been partly destroyed and nearly rased to the ground.
The abbey was officially closed in 1757 on the orders of the bishop. The church buildings were demolished around 1766 and the rest of abbey destroyed in 1790; of these buildings, only a few ruins remain, integrated into the Château de La Pommeraye (a private property): a defensive wall, a 13th-Century portal, an 18th century manor with a 13th century floor, and remains of the church.A monunment has been erected to the memory of the founders who were buried in the now defunct church: Arlette, Herluin and Robert de Mortain, as well as Robert's wife, Mathilde de Montgomerie, daughter of Roger de Montgomerie.References:
The chapel of Notre Dame du Haut in Ronchamp is one of the finest examples of the architecture of Franco-Swiss architect Le Corbusier and one of the most important examples of 20th century religious architecture. It was built between 1953 and 1955. The chapel is a working religious building and attracts 80,000 visitors each year.
Notre Dame du Haut is commonly thought of as a more extreme design of Le Corbusier’s late style. The chapel is a simple design with two entrances, a main altar, and three chapels beneath towers. Although the building is small, it is powerful and complex. The chapel is the latest of chapels at the site. The previous chapel was completely destroyed there during World War II. The previous building was a 4th-century Christian chapel. At the time the new building was being constructed, Corbusier was not exactly interested in “Machine Age” architecture but he felt his style was more primitive and sculptural. Also, he realized when he visited the site that he could not use mechanized means of construction, because access was too difficult.