In 2014, as part of the D’Days design festival, the City of Paris, along with the RATP and JCDecaux, launched a call for proposals by graphic designers in order to occupy the advertising spaces in the Paris metro. The series of posters, Behind The Seen, was conceived as both a space of visual silence and a counterpoint to the saturation of images and messages with which metro users are confronted, and as an invitation to escape, for a moment, from the confined, subterranean spaces of the metro system.