The aim of the project is to offer to the AP-HP an efficient, adaptable and economic tool translating itself into an appropriate, rational and progressive building.

These steps have thus led to a rationalization of the projecct within its own volume and to the simplification of its organization. the radicalism and minimalism of the Riedberger and Chevalley building imparts a genuine rationality and efficiency to the latter.

The principle consists in adorning the Pavilion with a metallic and glass fiber reflecting its environment. The latter appears to be a monolith made of glass and black metal as pure as a dark mirror. This neutral skin will then be able to take all the color variations emanating from the surrounding light. It is a chamaleon dressing which reacts to its own environment, to the town and to the life that elapses there. Just as a precious stole's topstitch or like stone outlines of cornice of the classical architecture, this envelop is set with horizontal and vertical lines that underline the design and give back to the structure a human scale. The play on shadows and light arising from the lines' thickness and the vertical plan of the façade varies upon the time and direction making the Pavilion's ornament vibrates.

It is an highly functional project conceived for users, enveloped by a mantel of light and which introduces life and breaches with the immobility of the constructed surrounding.