At Châtillon–Montrouge, a station becomes a sky. With Ciel d’argent, artist Laurent Grasso transforms the future Line 15 South into a sensory experience. Métalobil supports this monumental work, from fabrication to installation.
Underground, a sky takes shape. In the future Châtillon–Montrouge station of the Grand Paris Express, artist Laurent Grasso envisions a vast celestial vault inspired by Renaissance painted skies. Titled Ciel d’argent, the work envelops travelers from the moment they enter the station. Conceived in close dialogue with the architecture designed by David Trottin, the composition originates in the artist’s studio before being digitized and screen-printed onto 2,750 metal slats. Once assembled, they will form nearly 800 m² of ceiling, suspended above the flows, staircases, and daily movements.
Métalobil operates at the heart of this installation, ensuring the fabrication, execution, and installation of the work. Aluminum, the project’s central material, is folded according to an irregular pattern that captures light and extends the sky across the station walls. Installation, carried out using monumental scaffolding between level -4 and the ceiling, will continue until the supply shaft is closed. This project is part of a broader endeavor: the artistic program of the Grand Paris Express, for which Métalobil supports the realization of over thirty works at the intersection of art, engineering, and public space.
