Christians around the world are celebrating the central event of their faith - Easter - the holiday that marks what Christians believe is the resurrection of Jesus three days after his crucifixion. Pope Francis marked the holy day with a Roman Catholic Mass in St. Peter's Square.
Christians Celebrate Easter

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Pope Francis delivers the Urbi et Orbi (to the city and to the world) blessing at the end of the Easter Sunday Mass in St. Peter's Square at the Vatican , April 5, 2015.

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Faithful wait in the rain for Pope Francis' arrival to the Easter Mass in St. Peter's Square at the Vatican, April 5, 2015.

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Pope Francis waves as he delivers a "Urbi et Orbi" message from the balcony overlooking St. Peter's Square at the Vatican, April 5, 2015.

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Pope Francis salutes faithful in St. Peter's square at the Vatican, April 5, 2015.