Holy Island of Lindisfarne, Northumberland, England, United Kingdom, Europe. Holy Island history dates from the 500s AD as an important center of Celtic Christianity under Saints Aidan of Lindisfarne, Cuthbert, Eadfrith of Lindisfarne, and Eadberht of Lindisfarne. After Viking invasions and the Norman conquest of England, a priory was reestablished. A small castle was built on Holy Island in 1550. Photos by Tom Dempsey.