A film by Anne Rizzo on the project to renovate the centre of Ivry-sur-Seine (1960-1990) with Renée Gailhoustet, the project’s chief architect, and Irénée Scalbert, professor at the Architectural Association of London. This collective experience combines the municipality and its project owners with a group of architects including Jean Renaudie, to whom it offers the opportunity to design some of its major works.