This paving-stone of a book opens with the evisceration of Paris during the decades it took to build the metro. Anonymous photographers, followed by the likes of Doisneau, Boubat, Lartigue, Izis, Newton, Klein and Meyerowitz, captured this ecosystem that was expanding before people’s very eyes. Fleeting instants, foreign yet strangely familiar, forever frozen. Since 2013, the RATP has been displaying photography in some of its stations. The images in Paris-Métro-Photo immerse readers in a strange yet everyday reality. This heritage, a world apart, demands to be looked at with deferential curiosity.