Permanent Concern is a series of smartphone photographs made in the Netherlands. The work attests Cavalier's obsession for urban spaces and their development under a rational thinking. Bricks, concrete and plastic sometimes constitute the physical materiality of the objects that he’s photographing. Using a maximum zoom and monochrome laser prints, Cavalier reveals their inherent structure and shows them activated by people or nature. By doing so, Cavalier highlights failure as a quality of urban planning that gives room for a subjective and personal use among the cities that we inhabit.