By considering monetization across the Iron Age and Roman periods and across the whole of Temperate Europe some major developments become apparent. The spread of coinage in the Iron Age bears some relationship to the eventual extent of the Roman Empire. Coins stand in the archaeological record for systems of doing things, for ways people relate to each other and to things, and for ways of conceptualizing the world. They provide a useful way to approach the meeting of the worlds of the Iron Age and of Rome. Material forms of being Roman became increasingly important as a dimension of Roman identity. The commercialization implicit in Rome's ‘Cultural Revolution’ was underpinned by the extension of Roman-style monetization. In this light the monetization of Temperate Europe emerges as a process of considerable importance.

Over 52,000 Roman coins have been recorded and published from Wales. Using this comprehensive numismatic sample, this article investigates how coins of different metals and denominations were used and lost in western Britain during the later Iron Age and early Roman periods. The analysis of coins from hoards, excavated sites and single finds produces a more detailed picture of coin supply and use in Roman Britain than has been the case in the past and, consequently, it is now possible to provide a relatively sophisticated description of the monetization of Wales in the decades immediately before and after the conquest in the later first century A.D. The complexities of the early numismatic history of Wales are explored using a series of chronological and regional case-studies, while the discussion emphasises the role of native traditions in shaping local responses to the appearance of coinage and the foreign practices associated with using Roman imperial currency.