Abstract: In the play, Qui n’a pas son Minotaure ?, Yourcenar tries to subvert a myth of origins through the character of Theseus : she transforms the civilising hero into a devouring monster. Despite the apparent subversion of the myth, Yourcenar seems to go back to certain forgotten aspects of Theseus’ legend that she manages to take to the extreme in order to show how men can give birth to a monster civilisation.