Italian Premier Matteo Renzi and his wife Agnese are welcomed by Archbishop George Gaenswein, prefect of the papal household, in St. Peter's Square at the Vatican, Sunday, April 27, 2014. Tens of thousands of people have filled St. Peter's Square for a historic day of four popes, with Popes Francis and Benedict XVI honoring John XXIII and John Paul II by declaring them saints in the first ever canonization of two pontiffs. (AP Photo/Gregorio Borgia)