About the book: 2001 / The book by famous Breton celtologists F. Leroux and C.-J. Guyonvarch is dedicated to the phenomenon of Celtic civilization, which did not exist in Europe of Celtic communities. The authors provide a retrospective overview of the history of the Celts before the era of Christianization of the British Isles, and analyze the development of Celtic languages ​​and literatures. Particular attention is paid to the history of pre-Roman and Roman Gaul, the history and culture of medieval Brittany. Researchers come to original conclusions about the primacy of the spiritual power of the Druids and the secondary importance of secular royal power in traditional Celtic society. The book is intended for historians, philologists, and anyone interested in the culture of the Celts.