A visitor points as he walks past a creation as part of the exhibition "Defini Fini Infini, Travaux in situ" by French artist Daniel Buren 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's 1947 Cite Radieuse (Radiant City) and created by French designer Ora-Ito. The exhibition will run until September 30, 2014. REUTERS/Jean-Paul Pelissier (FRANCE - Tags: ENTERTAINMENT SOCIETY)