'We will tear down all walls,' Pope says at Fatima centenary in Portugal

Pope Francis is urging Catholics to "tear down all walls" and go to the peripheries to spread peace and justice.

Francis made the appeal Friday as he arrived at the Portuguese shrine in Fatima, one of the most important Catholic sanctuaries in the world.

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Francis is in Fatima to mark the anniversary of the "visions" of the Virgin Mary reported by three shepherd children 100 years ago.

During an evening prayer, Francis told the tens of thousands of pilgrims: "We will tear down all walls and cross every frontier, as we go out to every periphery, to make known God's justice and peace."

He spoke after spending several minutes in silent prayer before the statue of the Madonna at the chapel built in Fatima at the site of the apparitions.

For days now, church groups, families and individuals have made their way to Fatima, about 150 kilometres north of Lisbon, some on their knees in prayer. Carrying candles, rosaries and roses, they have made their way to the statue dedicated to Our Lady of Fatima or tossed wax body parts ears, hearts, limbs into a huge fire to pray for healing.

"For me it is the second time I am here with a pope, first with John Paul II and now with Papa Francisco," said pilgrim Elisabete Fradique Conceicao in between rain showers Thursday. "They are simple men and that simplicity makes sense when you think what happened here 100 years ago."

On May 13, 1917, while they were grazing their sheep, the children allegedly saw the first of a half-dozen visions of the Virgin Mary. They said she revealed to them three "secrets" apocalyptic messages foreshadowing World War II, hell, the rise and fall of communism and the death of a pope and urged them to pray for peace and turn away from sin.

At first doubted by the local Catholic Church and even their parents, the children's story gained believers and was eventually accepted as an authentic apparition by the church in 1930. The children being canonized, brother and sister Francisco andJacintaMarto, who were nineand sevenat the time of the apparitions, died of influenza two years later. Their cousin, Lucia dos Santos, at 10 the ringleader of the group and who became the main raconteur of their tale, is on track for beatification, the first step toward becoming a saint. Her case couldn't begin until after herdeath in 2005.

Francis's deputy, Cardial Pietro Parolin, said the importance of Fatima lies specifically in the fact that poor, illiterate children not the wealthy, learned or intellectuals were able to convey a powerful message of love and forgiveness at a time of war when "the talk was of hatred, vendetta, hostilities."

Fatima has long been associated withJohn Paul II, given the Polish-born pope credited the Virgin Mary with having saved his life in 1981 when a would-be assassin shot him on Fatima's feast day May 13 in St. Peter's Square. John Paul made the first of his three pilgrimages to Fatima the following May, and one of the bullets fired at him now adorns the crown of the Madonna at the shrine.

Like John Paul, the Argentinian-born Francis is exceedingly devoted to the Madonna, thanks in large part to the strong role that Marian devotions play in the popular piety of Latin American Catholics.

Before every trip he takes, Francis brings a bouquet of flowers to an icon of Mary at the Rome basilica dedicated to her name, St. Mary Major.

On his first trip as pope, to Brazil, he prayed at the shrine to the Madonna at Aparecida. He has done the same at the shrine of Our Lady of Guadalupe in Mexico, at the shrine of Caacupe in Paraguay and the Virgin of the Charity of Cobre in Cuba.

One major shrine he has avoided visiting is in Medjugorje, Bosnia-Herzegovina, where six youngsters reported having had regular, repeated visions of the Virgin starting in 1981. A Vatican-appointed doctrinal commission finished its study years ago, but Francis hasn't released the results.

He has cautioned against such tales of regular visions, however, and has said Marian devotion must be to "the real Madonna. Not the Madonna who's like the head of a post office who every day sends a different letter saying 'My children, do this and then the next day says do that."'

The church says the Fatima case is altogether different.

In a video message on the eve of his departure, Francis urged all faithful to join him, physically or spiritually, in Fatima.

"With all of us forming one heart and soul, I will then entrust you to Our Lady, asking her to whisper to each one of you: 'My Immaculate Heart will be your refuge and the path that leads you to God."'