Westminster Abbey is one of the most important and well-known medieval buildings in Europe but, despite being studied by generations of scholars, there is still much to learn about its history and architecture. The lantern over the center of the church is a case in point. Edward the Confessor built a great tower here, which is depicted on the Bayeux Tapestry. When Henry III was rebuilding the Abbey in the 1250s, a new tower was begun which was to...