The author, an archaeologist, is now directing the restoration of a Viking ship in Normandy. In this book, he traces the evolution of this type of clinker-built ship, from the most ancient prototypes (Hjortspring), to the later models (Roskilde), with many detailed plans. He then explains their construction and modes of navigation used, as well as the religious concepts linked to the fantastic figureheads. Finally, he displays several modern replicas of these ships. TEXT IN FRENCH