Hampshire (southern England) north of roughly the latitude of Winchester is dominated geologically by the Upper Cretaceous Chalk Group and by a substantial outcrop of Tertiary clays and sands which, forming part of the London Basin, the county shares with Berkshire to the north. More than 115 churches, by in excess of 60 designers and architects, were rebuilt, built anew and/or significantly modified in this area between 1750 and the First World War in response to profound changes in population, sources of wealth and means of transport and communication. This work looks at their building materials and decoration.