Abstract: This article focuses on two twelfth-century authors living in the kingdom of Henri II: Wace, the author of the romance of Brut, and Marie de France. It suggests that Marie’s literary project – the creation of a collection of twelve lais – was influenced by Wace’s romance. Marie fills the temporal and thematic gaps of the Brut by describing the adventures of the Bretons, about which Wace, as historian, makes no comment.