Pilgrims flood into the Vatican ahead of Canonization

Faithful wait in St. Peter's Square at the Vatican on April 26, 2014. Pope John XXIII, who reigned from 1958 to 1963 and called the modernizing Second Vatican Council, and Pope John Paul II, who reigned for nearly 27 years before his death in 2005 and whose trips around the world made him the most visible pope in history, will be declared saints by Pope Francis at an unprecedented twin canonization on Sunday.

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Nuns hold portraits of late Popes John XXIII and John Paul II on St. Peter's Square on April 26.

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People attend a Mass for late Pope John XXIII at the Basilica of St. John Lateran on April 26 in Rome. Popes John Paul II and John XXIII will join the roster of saints at a historic Vatican ceremony on April 27 seen as an attempt to unite conservatives and reformists, with some 800,000 pilgrims expected in Rome.

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Pilgrims from around the world descend on St. Peter's Square.

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A priest conducts Holy Communion for believers on a train travelling from Austria to Rome for the canonization on April 26.

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Priests sing in Saint Peter's Square.

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Nuns walks past pilgrims in St. Peter's Square on April 26.

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A nun arranges candles underneath an image of the late Pope John Paul II at the Polish church, Santo Spirito in Sassia, Sanctuary of Divine Mercy, on April 26.

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