Pope Francis greets Emeritus Pope Benedict XVI before a mass in Saint Peter’s square at the Vatican

Pope Francis (R) greets Emeritus Pope Benedict XVI before a mass in Saint Peter’s square at the Vatican September 28, 2014. Former Pope Benedict will take part in a gathering of elderly people at the Vatican on Sunday, only his third appearance at a public event since he resigned in February 2013. REUTERS/Tony Gentile (VATICAN – Tags: RELIGION TPX IMAGES OF THE DAY)