ผู้เขียน: Jon Vidar Sigurdsson

Jón Viðar Sigurðsson is a Professor in the Department of Archaeology, Conservation and History at the University of Oslo. He is the author of several books, including Chieftains and Power in the Icelandic Commonwealth, and coeditor of Celtic-Norse Relationships in the Irish Sea in the Middle Ages 800–1200, Friendship and Social Networks in Scandinavia, c. 1000–1800, and Ideology and Power in the Viking and Middle Ages.