NORFOLK, ENGLAND—A volunteer project to record medieval graffiti in Norfolk is spreading across England. More than 28,000 images, perhaps doodled by churchgoers, have been recorded in Norfolk, and only one-third of Norwich Cathedral has been searched so far. “[Medieval graffiti] was believed to be rare—turns out it’s not,” Matt Champion, a medieval archaeologist who started the program in 2010, told BBC News. Images of compass designs, windmills, sundials, circles, and ships have been documented. “Are they thanksgiving for a voyage safely undertaken, or a prayer for safe passage on a journey yet to come? Some of these ship images appear to show deliberate damage, begging the question whether they are prayers for long overdue ships,” he explained.