Pope Francis (L) salutes the Eastern Orthodox metropolitan of Pergamon, Joannis Zizioulas, at the end a mass for the investiture of the Pallium, a liturgical vestment that symbolizes the bonds of hierarchical communion, on the new Metropolitan Archbishops on June 29, 2015 at St Peter's basilica in the Vatican.  AFP PHOTO /  FILIPPO MONTEFORTE        (Photo credit should read FILIPPO MONTEFORTE/AFP/Getty Images)