Mecca 04, issue now out of print, is dedicated to the workshop Formes souterraines, une géométrie organique, initiated by Crédac and led by artist Julien Pastor with Rodolphe Bouvet’s fifth grade class at the Einstein elementary school in Ivry-sur-Seine, and accompanied by visual arts pedagogical advisor Dominique Thouzery. This workshop was born from the encounter between a particular architecture, Jean Renaudie’s architecture, in which the Einstein school is embedded, both in its form and in the pedagogical design that underlies it and Julien Pastor’s work.