A 5th-century chalice covered in religious iconography has been discovered in Northumberland, to the astonishment of archaeologists, who describe it as Britain’s first known example of Christian graffiti on an object. With its complex mass of crosses and chi-rhos, angels and a priestly figure, as well as fish, a whale and ships, it is believed to be without parallel in western Europe. Made of lead and now in 14 fragments, it was unearthed at the Vindolanda Roman fort, one of Europe’s foremost archaeological sites, near Hadrian’s Wall, during an excavation that has also discovered the foundations of a significant church...