Nested at the heart of a recreational, lively park in the city center, the Raspail Castle is one of the few remaining monuments bearing witness to the Cachan of the past.Among other things, the castle used to be the residence of its eponymous landlord, François Vincent Raspail, mostly known for his scientific and political work. The monument is not clearly visible from the street, and the park remains closed at night. Illuminating the castle and its vicinity allows the city to open the park for celebrations and events, and to offer Cachan residents a majestic and colorful lighting design.
Three light effects are combined to accentuate and assert the main facade of the castle. Their combination summarizes in one stage the different layers of history and composition of the building. The castle then becomes an illuminated volume as it becomes more visible, but also as it echoes its immediate surroundings. A colorimetric work in relation to the colors of the park offers various illuminations throughout the seasons and events of the city.