Somewhere around A.D. 968, monks, from the Benedictine monastery of Mont Saint-Michel, came to Guernsey to establish a community in the North of the Island. It is likely that at one time a land bridge connected the two sections next to the Vale church, before the sea broke through. In 1204 it is reported that the Royal Court of Guernsey visited the Braye du Valle to replace boundary markers that had been washed away. This area of Guernsey would form a separate island at high tide, and continued to do so until 1806. The Priory of Mont Saint-Michel was a dependency of the famous Abbey of Mont Saint-Michel. The last remaining stonework is a piece of buttressed wall to the South of the church, by the roadside.