The proposed primary school is part of a wider redevelopment of the island of the old hospital in the town of Chatellerault context. Located on a place forming the historic entrance to the city, overlooking the coming and presenting landscape and heritage qualities remarkable , the transaction represents a major challenge for the future of Chatellerault. The purpose’s project is double: Achieving urban planning capable of uniting the neighborhood renewal and enabling residents to reclaim this site in the heart of the city, and build a school that is thanks to its spatial qualities and architecture, a strong and identifiable signal while providing the best reception conditions for all users. To achieve this goal, we developed the project in strata. The first is a base anchored in the site, it shows the topography of the site and its history. It is also the starting point of our thinking on urban regeneration . The second is characterized by a segmented volume, conducive to necessary porosity functions of the reception The latter takes the form of a rectangular monolith that redraws the island to confirm the presence of the public building. All echoed by opposition between materiality, gravity and light , privacy and openness in the country. This stratification’s project is a simply answer to the program. On the ground floor, the kindergarten , on the first floor, the primary school . The strategic positioning of the former bastion at the corner of the city guided the urban and integration and landscaping of the project. This particular geography, topography , archaeological remains and water-related constraints were lead our development proposal. If the strict volume seems to freeze the project it is well a building in movement that appears to walkers . Throughout his walk ,perspectives and transparencies will be open , spaces will let be discovered ,a fragment of sky will appear to us , and the next moment our perception has already changed. It’s that kinetic principle that make the building acquiring more thinness stresses by the first floor in cantilever Throught out the volume and the façade’s treatments, the Claudie Haigneré school group is a building that makes you want to know more , to come in to see what it is really and constantly surprises us .