Archaeological finds have shown that there were Stone Age people in the area, and that some Iron Age finds also exist. During the Roman period, the area became part of the Roman communications network. It was connected by road to Canterbury and Watling Street and it became "Portus Dubris", a fortified port. Dover has a partly preserved Roman lighthouse (the tallest surviving Roman structure in Britain) and the remains of a villa with preserved Roman wall paintings. Dover later figured in the "Domesday Book".