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Pope Francis on his arrival in Portugal for his visit to the Shrine of Fatima, to observe the centenary of the apparitions of the Virgin Mary to Francisco, Jacinta, and Lucia ©Osservatore Romano/AFP 1/14
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Pope Francis greets Portuguese President Marcelo Rebelo de Sousa on his arrival at the Monte Real military airbase in Leiria, some 25 miles from the Shrine of Fatima ©Alessia Giuliani/CPP/CIRIC 2/14
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A woman shares her icon of the Virgin Mary at the shrine of Our Lady of Fatima before the arrival of the Pope. May 12, 2017 ©Alessia Guiliani /CPP/CIRIC 3/14
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The pope arrives at the Shrine of Our Lady of Fatima, using his “popemobile.” 12 May 2017, ©Alessia Giuliani /Cpp/CIRIC 4/14
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Pope Francis greets pilgrims on his arrival in Portugal as he visits the Fatima shrine in observance of the centenary of the apparitions of the Virgin Mary. ©Pedro Fiúza / NurPhoto 5/14
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The Holy Father pauses before the statue of Our Lady of Fatima, in silent prayer. ©Francisco Leoung/AFP 6/14
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Pope Francis prays at the sanctuary of Our Lady of Fatima, May 12, 2017. ©Alessia Giuliani/CPP/CIRIC 7/14
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Pope Francis and clergy, along with thousands of pilgrims, in prayer before Our Lady of Fatima. ©AFP Photo/Osservatore Romano 8/14
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A prayerful Pope Francis reverences Our Lady of Fatima. ©Patricia De Melo Moreira /AFP 9/14
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During a vigil of prayer, Pope Francis blessed the candles of pilgrims in the Chapel of the Apparitions in Fatima, on May 12 2017. ©AFP Photo/Osservatore Romano 10/14
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Pope Francis prays in front of the grave of two of the three little shepherds at the Shrine of Our Lady of Fatima in Portugal on May 13, 2017.

The two young shepherds, Jacinta and Francisco Marto, who had visions of the Virgin Mary 100 years ago in Fatima, a Portuguese site now a global draw for pilgrims, were declared saints today by Pope Francis. / AFP PHOTO / POOL / TONY GENTILE
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Amid many thousands, Pope Francis celebrates the canonization Mass of the newly proclaimed saints, Francisco and Jacinta. May 13, 2017 ©STF/AFP 12/14
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Pope Francis embraces Lucas Yurie, whose recovery from life-threatening head injury was declared miraculous and credited to the intercessory prayers of Saints Francisco and Jacinta, of Fatima. ©AFP Photo/Tiziana Fabi 13/14
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Pope Francis playfully greets a little girl during his visit to Fatima on May 13, 2017. ©STF/POOL/AFP 14/14