The ancient cathedral was the pinnacle of medieval society's spiritual and cultural life employing the best designers, artists, craftsmen and materials that available money could buy. They developed into enclaves of worship, learning, hospitality, art, music, agriculture and medicine in an often chaotic and violent outside world. A change of religion, rulers and constitution has meant they have constantly been rebuilt and altered throughout their 1,700 year history. Many will be overwhelmed by their size and beauty, baffled by their layout and symbolism. They may well ask: Why were they built...