In a landscape that refused to take the time, the project has to dictate its own history. Establish on a corpus, experiences, analyses, successful or unsuccessful tests, testimony, festive or informal meetings, but mainly actions. The story of a project has to be legitimizing before laying the first stone. We have to seek for the popular movement, the great mass. After At the end of the day everything is possible, the project is just an excuse. The architecture makes sense only if it embraced the energy. The project The Cartoucheries is the development of a public space located in the eco-district of the Courouzze in Rennes, under construction. This metropolitan shipyard, spreading over 20 years, already welcomed their local inhabitants, facing a new reality that they do not control. Waiting for each components of the city to be set up to ensure that the urban live, is for us an abstraction. Our role is to plan the first projection across these unrealized spaces, to bring the possibility to make their own and to describe it. Initially, we didn’t want to do determine the project in its entirety. We occupied the premises and settle down in a scaffolding base camp. Therefore things are not fixed and being built with the continued participation of all the information and the informant that will occur during the operation. As we moved forward to the use and the experience, we created a common history, made possible by an open site of 6 months duration, punctuated by some workshops. It was the desire to build an everyday life and that the end was the project accomplished today. It still in place today, adopted by the local peoples, and now under the jurisdiction of the city of Rennes.