Published May 03. 2013 4:00AM
L'Osservatore Romano/AP Photo
Emeritus Pope Benedict XVI, left, is welcomed back to the Vatican from the pontifical summer residence of Castel Gandolfo Thursday by Pope Francis. His return begins an unprecedented era 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.