This book looks at the 1st Millennium BC double-ringwork enclosure of Meillionydd on the Ll?n Peninsula. It is an analysis of LBI-ArchPro’s GPR survey and interpretation, which creates the foundations for studying the prehistoric buildings that occupy the settlement of Meillionydd. The first two chapters introduce the surrounding landscape of North-West Wales, the basics of ground-penetrating radar and stratigraphy, and provide comparison between modern and prehistoric house construction. The third chapter outlines the physical stratigraphic features of the site, the layout of the prehistoric buildings and provides a stratigraphic report to help understand the phases of occupation at Meillionydd. Whilst the next two chapters discuss the capabilities, the opportunities and the reasons behind Meillionydd’s construction, theorising based upon the archaeological evidence provided in the previous chapters. The final chapter brings everything together and encourages us all to think about the future of archaeology. This book should provide the reader with an insight into the occupational habits of the prehistoric people living on the Ll?n Peninsula.