Cut off from the mainland by twice-daily high tides, Lindisfarne feels remote today. Yet its semi-detached character made the island an ideal base for the Irish missionaries who in AD 635 founded the monastery that became one of the most important centres of early Christianity in England. It was here that the masterpiece now known as the Lindisfarne Gospels was created in the early 8th century. The Priory was established in the 12th century by monks from Durham. English Heritage managed.