Sigismund Cassidanius alias Sig is a polymorphic artist who writes exhibition texts, promotes urban art, programs walls and animates visits. Guide and urban animator today, he has been interested in street art since the beginning of the 90s, intrigued by Mesnager, Mosko and Nemo. Today, he shares his passion for urban art through his visits and projects with the association Les Arts Fleurissent la Ville, of which he is President and Artistic Director.