By the end of the medieval period, Britain’s churches already had an architectural heritage of one thousand years, much of which remains on view today. This guide by architectural historian Jon Cannon uses high-quality photographs and diagrams to help us to analyze the leading changes in style from the Anglo-Saxon period, through the Romanesque as far as Gothic and Perpendicular. By identifying various clues left by each period, he enables us to date architectural features and styles, and explains the technical terms applied to them. If you have ever wondered how your church or cathedral developed, and want to know your triforium from your blind arcade or your vault from your hammerbeam, all the answers are here.