Iconoclasm—that is the opening idea of the Galerie du Temps at the Louvre-Lens, the decade-old branch of the Louvre museum in the Pas-de-Calais region of northern France. Immediately upon entering the gallery’s massive room, one is confronted by a large installation of fifteen photographs, a panorama of dun-colored cliffs that rise from scattered dwellings at their base to a mountain peak above. Noticeable are two caverns, negative spaces so large that they dominate the landscape…