The county of Norfolk contains the world’s greatest concentration of medieval churches, with over 650. Since some of these churches date from at least half a millennia ago, some have not survived as well as others. In the woods of East Somerton barely stands one such church. St Mary’s church, with its glassless windows, tumbling walls, and a tower in which one can look up into the open sky, is the definition of a romantic ruin. Dating from the 15th-century, St Mary’s went from serving its own parish to becoming…