Although Christianity had existed in Britain before the invasionsof Angles and Saxons in the 5th century, Pope Gregory the Great decided in 596 to send a mission to the pagan Anglo-Saxons. He selected, from his own monastery on the Coelian hill in Rome, a group of monks, led by their prior, Augustine. They arrived in Kent in 597, carrying a silver cross and an image of Jesus Christ painted on a board, which thus became, so far as we know, “Canter…