This study examines the narration within architectural design. It is carried here from an epistemological point of view. The architect-narrator is at the nub of various activities presented through three pictures: the storyteller, the designer, the worldbuilder. The story is then viewed as a specific aspect of the architectural design, i.e. the conception of reception. The architect imagines all together an artifact and the life in it, as he would make a world. As the understanding of the design is broadened by the storytelling, it calls for a thought about its knowledge. Distrust the communication to know the design encounters methodological question, however, a cross-fertilization of communication science and design science seems possible. This disciplinary meeting after all leads to the hypothesis of a complex case: the interaction of storytelling and design.