Having become king of England at the battle of Hastings in 1066, William of Normandy would go on to found a genuine empire. His reign lasted 21 years. Amongst his children were two kings, a Duke, an Abbess, and two Countesses. Upon his death, his descendants tore each other apart, and his empire was fragmented until the accession of the Plantagenets, who extended the Anglo-Norman territory as far as the foothills of the Pyrenees. This book recounts the life of his principal descendants from Robert Courteheuse to the Empress Matilda. This is a French Language book.