In this photo provided by the Vatican newspaper L’Osservatore Romano, Pope emeritus Benedict XVI, left, is welcomed by Pope Francis as he returns at the Vatican from the pontifical summer residence of Castel Gandolfo, 35 km South-Est from Rome, Thursday, May 2, 2013. Emeritus Pope Benedict XVI came home on Thursday to a new house and a new pope, as an unprecedented era begins of a retired pontiff living side-by-side with a reigning one inside the Vatican gardens. In background is archbishop George Gaenswein, prefect of the papal household. (AP Photo/Osservatore Romano, HO)