Dali, street art. The questions of support, of diversion, of space, of the representation of space suddenly emerge. How to conceive an exhibition on street art in the museum space ? How to talk about the strong relationship between space and art in street art ? In the style of the work of street art which reveals itself during a urban ramble, the scenography of the exhibition rests on a gradual appearance as the viewer moves on. The several marking elements on the floors and the walls scattered in the space meet at a single point - that of the point of view - to form a two-dimensional image, a framing that allows to compare a work of Dali and a work of a street artist. This light and radical intervention makes it possible to emphasize the works themselves and to draw a bridge between the work of Dali and the contemporary work of street art through some Dali's themes. From then on, it is less a contemplative look than an active and participative observation that is proposed here, and which continues through a space of free expression destined to young and adults. A mediation by doing more than by seeing, that makes it possible to understand the mechanisms involved in the creation of a work of art such as support, subject, medium, meaning, intention.