While some chapters focus on settlements that were cities or towns from a juridical point of view, the implications of using a purely functional definition of towns are also explored. Key themes include continuities and discontinuities between pre-Roman and Roman settlement patterns, the geographical distribution of cities belonging to various size brackets, economic relationships between self-governing cities and their territories and the role of cities as nodes in road systems and maritime networks. In addition, it is argued that a considerable number of self-governing communities in Roman Spain and Portugal were poly-centric rather than based on a single urban centre. The volume will be of interest to anyone working on Roman urbanism as well as those interested in the Iberian Peninsula in the Roman period.