Brigitte Philippon and Jean Kalt, who have been partners for the last fifteen years, work with their team of ten in the fields of architecture, town planning and design. Their architectural philosophy, which is the result of an urban, social, environmental and technical approach, is always in response to the context and considers the long-term prospects for the city. For them the challenges of sustainable development are an opportunity to develop innovative systems, bringing together good energy performance and quality living spaces for residents and users. In planning the only island eco-district in France, they are doing the groundwork and creating a symbolic example for the cities of tomorrow. They also work in the areas of events and multimedia through their agency Ponka, which specialises in communication design. Having created a number of sound and visual projects, it was one of the first French agencies to incorporate in situ augmented reality, as a prelude to urban photography and art. Ponka is heavily invested in the subject of smart cities, and designed the first changing display photovoltaic screen: the PonkaWall, supported by the Ile de France Region, Paris Région Lab, Oséo, BPI and Caisse des Dépôts.