Summary While it is well-established that Brittany and the Insular world were closely linked during the medieval period, the precise nature of these connections continues to spark debate. Was there a significant migration in the fifth century, or were the connections more multi-faceted and enduring than medieval accounts suggest? And how might we triangulate the Atlantic connections with other influences on medieval Brittany, including those from the Carolingian world? Drawing together research that was first presented at the conference 'Brittany and the Atlantic Archipelago: Contact, Myth and History 450-1200', held in Cambridge in December 2017, this volume seeks to present new and ground-breaking research into both Brittany and its broader European context during the medieval period. The chapters gathered here range across various disciplines, including textual history, archaeology, hagiography, onomastics, and the study of liturgical evidence, offering new insights into our understanding of medieval Brittany, as well as drawing out particular connections (and disconnections) between Brittany and its neighbours. TABLE OF CONTENTS List of Illustrations Acknowledgements Abbreviations 1. Introduction Caroline Brett, Fiona Edmonds, and Paul Russell 2. The 'Late Roman Military Migration': A Historiographical Myth Patrick Galliou 3. The Settlement of Brittany in Light of a Migration Period Archaeology John Hines 4. The Archaeology of Early Medieval Rural Societies in Brittany ? Settlements, Landscapes, Legacies, and New Influences: Interdisciplinary Research Isabelle Catteddu and Joseph Le Gall 5. Espace et pouvoirs en Bretagne aux premiers si cles du Moyen ge (VIe-IXe si cle) Magali Coumert 6. Alain de Bretagne, l'exil d'un Prince Joelle Quaghebeur 7. Memoria, Memorialization, and the Monks of Mont-Saint-Michel, c. 960-1033 K. S. B. Keats-Rohan 8. Pr sence d'une culture celtique insulaire chez les anciens hagiographes bretons Joseph-Claude Poulin 9. Cross-Channel Intercourse in the Earliest Breton Vitae Karen Jankulak 10. Explaining the Origins of Brittany in the Twelfth Century: St Cadog's Solution Ben Guy 11. Generic Place-Name Elements in the Three Brittonic Regions O.J. Padel 12. Facing Different Ways: the Onomastics of People in Medieval Brittany Paul Russell Index