Visitors walk on a creation by French artist Daniel Buren as part of his exhibition &quot;Defini Fini Infini, Travaux in situ&quot; at the MaMo art center in Marseille September 12, 2014. The MaMo contemporary art center is installed on the restored rooftop terrace of Le Corbusier&#039;s 1947 Cite Radieuse (Radiant City) and created by French designer Ora-Ito. (Photos by Jean-Paul Pelissier/Reuters)