Book excerpt: From battlefield to sacred building, from castle to cottage, from the Bridgwater Canal to Blackpool Pier, acclaimed historian John Julius Norwich tells the political, cultural, social, religious and economic story of England through one hundred key places you can still visit today. Part narrative history, part exploration of our national heritage, his wide-ranging selection of sites will stimulate, entertain, inform - and certainly provoke - a debate about the most significant moments in English history.