Updated April 27, 2014 10:35 AM
By The Associated Press
DANIELA PETROFF (Associated Press), NICOLE WINFIELD (Associated Press)
Pope Francis asperses incense as he leads a solemn celebration 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/Andrew Medichini) (April 27, 2014 6:08 PM)
(AP) -- Pope Francis declared Popes John XXIII and John Paul II saints before some 800,000 people on Sunday in an unprecedented ceremony made even more historic by the presence of emeritus Pope Benedict XVI in St. Peter's Square.
Never before have a reigning pope and a retired pope celebrated Mass together in public, much less at an event honoring two of their most famous predecessors.
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