Museum of Contemporary Arts MAC's director Laurent Busine (L) escorts Belgian Queen Mathilde during a visit to the 'La Salle de Pendus' exhibition by Christian Boltanski at the MAC's in Hornu on July 15, 2015. AFP PHOTO / BELGA / LAURIE DIEFFEMBACQ == BELGIUM OUT == RESTRICTED TO EDITORIAL USE, MANDATORY MENTION OF THE ARTIST UPON PUBLICATION, TO ILLUSTRATE THE EVENT AS SPECIFIED IN THE CAPTION ==        (Photo credit should read LAURIE DIEFFEMBACQ/AFP/Getty Images)