not only by notions like sema and mnema , but also by different means. I would like to analyse one of these various means using the idea of Polyvalence des images , shaped by the founder [...] narrated, once again, by Pausanias. In the first book of the Perieghesis (Paus. I 43, 2), he reports an episode of Demeter's myth in order to explain a ritual practised by the megarian women. The [...] stone and that of somebody sitting on a stone. By reading these 'chains' of images, we have reached the same result. Both practices, (1) lifting up the stone, by its relationship with an initiation finalized