This paper deals with the introduction of iron technology in Northern Central Europe and discusses two major aspects. On the one hand, it asks to what extent we are able to trace the process of the introduction of iron and how it might have taken place. On the other hand, intended and unintended consequences of the introduction of this new technology are investigated. Can we spot ‘collateral processes’ that accompany the introduction of iron? To what extent do these processes enable such innovation, are an integral part of it, or are triggered by it?