People gather at Revolution Square for Pope Francis's mass on September 20, 2015. Pope Francis greeted massive crowds of fans and Catholic faithful Sunday as he arrived in his popemobile to give mass on Havana's iconic Revolution Square, the highlight of his trip to Cuba. Across from the square is a portrait of revolutionary leader Ernesto 'Che' Guevara on the front of the Interior Ministry building. AFP PHOTO / FILIPPO MONTEFORTE