England's churches and cathedrals form the country's most complete class of historic monuments and are a great source of interest. However, many are threatened with redundancy. This is an introduction to the new discipline of church archaeology, explaining how and why investigations are undertaken both above and below ground and what there is to be learned from them. The author considers how best to record the evidence and how to interpret it. He also shows how the evidence is significant and how important it is to preserve and record our heritage.