The cultural diversity of graffiti on urban walls. The aim of this random and fragmented selection is to show a constant production, anarchic and ephemeral, that becomes blurred by time or by various accidents. Most graffiti art is anonymous and its content is often harsh and thought-provoking, unclassifiable, surprising, beautiful, artificial, intelligent. It undergoes the imaginary treatment of accumulated experiences, reflecting the (in)coherence of their creator’s thoughts. Above all, graffiti is an explosion of creativity, rage and questioning of the world that surrounds us...