Pope Francis in popemobile arrives at Blonia Park on July 28, 2016 in Krakow for the welcoming ceremony of the World Youth Days (WYD. Pope Francis heads to Poland for an international Catholic youth festival with a mission to encourage openness to migrants. / AFP / JANEK SKARZYNSKI (Photo credit should read JANEK SKARZYNSKI/AFP via Getty Images)
World Youth Day Rio
Young pilgrims confess at the Quinta da Boa Vista park in Rio de Janeiro, Brazil on July 23, 2013. Pope Francis's popularity on his Latin American home turf posed a challenge to Brazilian authorities Tuesday after adoring crowds mobbed his car on his landmark visit during the World Youth Day (WYD) to Rio de Janeiro. AFP PHOTO / VANDERLEI ALMEIDA (Photo credit should read VANDERLEI ALMEIDA/AFP via Getty Images)
Pilgrims pray as Pope Francis leads the Via Crucis (Way of the Cross) procession on July 29, 2016 at Blonia Park in Krakow to, as part of his visit during the World Youth Days. Pope Francis is in Poland for an international Catholic youth festival with a mission to encourage openness to migrants. / AFP / FILIPPO MONTEFORTE (Photo credit should read FILIPPO MONTEFORTE/AFP via Getty Images)
SYDNEY, AUSTRALIA - JULY 15: Pilgrims carry the WYD Cross and Icon to the Opening Mass formally celebrating the start of World Youth Day 2008 at Barangaroo on July 15, 2008 in Sydney, Australia. Organised every two to three years by the Catholic Church, World Youth Day (WYD) is an invitation from the Pope to the youth of the world to celebrate their faith. The celebration, being held in Sydney from July 15 to July 20, 2008, will mark the first visit of His Holiness Pope Benedict XVI to Australia. (Photo by Ezra Shaw/Getty Images)
