Bringing together leading scholars from across Europe, this anthology uncovers the multifunctionality and strategic importance of these sites, revealing their role not just in local defence but also in the collection of tribute, production of luxury goods, and as centres of political and ritual activities. Drawing parallels with Anglo-Saxon England and the Carolingian Empire, the book widens the concept of aristocratic power in the Viking Age. This book is an essential read for anyone interested in Viking Age archaeology, medieval history, and the intricate connections between geography, power, and society in Northern Europe.