MAREE DES LETTRES allows you to arrange BIG LETTERS in the real space of Paris and write on a collaborative map. Download this App to participate: Make suggestions and vote for arrangements of the big letters along the Seine and become a letter yourself in a FLUX of letters. Marée des Lettres is an art work developed by members of the Invisible Playground networkfor Nuit Blanche Paris, 2017. During Nuit Blanche, 42 letters and 3 special characters are installed at the Berges de Seine, continuously rearranged throughout the night.