Norwich today has more medieval churches than any other city north of the Alps. The Brooke Commission concluded in 1970 that only six were required for parish worship and that either alternative uses should be found for the rest or they should be demolished. Fortunately, 31 remain, with half a dozen continuing to be used as churches and 18 in the care of the Norwich Historic Churches Trust. A newly published and sumptuously illustrated interdisciplinary study shows us what these churches can tell us about the city’s past and its people, as Chris Catling reports.