Anthropology and other social sciences have shown their value for the medieval dream ; psychoanalysis, despite the risk of an accusation of anachronism, and keeping in mind Devereux’s advice to exploit complementarity where complex cultural concepts are at stake, also has much to bring to the understanding of literary medieval dreams, with their often oedipal underpinnings, as in Tristan and Yseult, or in Le Roman de Troie.