“Concrete art wants to transform the world, it wants to make existence more bearable. He wants to save man from the most dangerous madness: vanity. He wants to simplify human life. He wants to identify it with nature... Concrete art is an elementary, natural, healthy art, which makes the stars of peace, love and poetry grow in the head and heart. Where concrete art enters, melancholy exits, dragging its gray suitcases filled with black sighs.” Jean Arp, 1944 Concrete art is above all a strictly non-figurative pictorial language. These are lines, shapes and colors: a graphic vocabulary accessible to everyone. A concrete work results from a simple and controllable construction, a creative protocol, which responds to a geometric principle imposed by the artist. She frees herself from the representation of the world which she simplifies to the extreme into lines, curves and right angles. A practice that moves away from the sensible, with no other reference than itself. And yes, a square remains a square. Sometimes, this protocol is disrupted, rigor is diverted to give way, not without humor, to a subversive utopia.