NASTY original subway map 37x37. NASTY is an unavoidable reference in Parisian graffiti. He starts in 1988 and quickly distinguishes himself by painting colorful frescoes on the subways. In his exhibitions, he stages the famous enamel plates of the RATP, which he has been using for more than 10 years. He also uses subway maps and thus perpetuates the original spirit of graffiti.