Lihou
The island has the ruins of the priory of St. Mary which is believed to have been set up by Benedictine monks in the 12th century. The monks of the priory were not very popular with the local people, who thought they were devil worshippers.  This animosity may be due to the monks' insistence on rights of wreck.  Until 1415 it was under the control of Mont Saint Michel and then Eton College until the Reformation when it was closed and fell into disrepair.