Pope Francis, second from left, watches Pope Emeritus Benedict XVI enter St. Peter's Basilica accompanied by Monsignor Georg Gaenswein, right, at the Vatican, on Dec. 8, 2015. Pope Benedict XVI's 2013 resignation sparked calls for rules and regulations for future retired popes to avoid the kind of confusion that ensued. Benedict, the German theologian who will be remembered as the first pope in 600 years to resign, has died, the Vatican announced Saturday Dec. 31, 2022. He was 95. (AP Photo/Andrew Medichini, File)