UNDERSTANDING THIS PILGRIMAGE

A St. Peter and the Papacy pilgrimage is a journey of prayer to the places of the Apostle Peter and of the office Christ entrusted to him: above all his tomb beneath St. Peter's Basilica in Rome, the Pope's cathedral at St. John Lateran, and, where possible, an audience or liturgy with the reigning Pope. Some pilgrims begin further back, on the Sea of Galilee, where Peter was called, confessed Christ and was told "Feed my sheep." Its purpose is not to admire an institution but to renew, with Peter, faith in Jesus Christ, and to pray for the man who now carries Peter's task.

What this pilgrimage is: a grave, a chair and a cathedral

Catholics have gone to Rome since antiquity for one reason before any other: the Apostles Peter and Paul bore their final witness there. The Church still calls this going "to the thresholds of the Apostles." Canon law asks every diocesan bishop to come to Rome periodically "to venerate the tombs of the Blessed Apostles Peter and Paul" and to present himself to the Pope (canon 400). A lay pilgrim who prays at the two tombs is doing, in a personal way, what the bishops are bound to do.

St. Peter's Basilica is built over the place the basilica itself describes in these words: "Here, Saint Peter was crucified and buried." The papal altar, the canopy and the dome stand in a single vertical line above the grave. Below the floor are the Vatican Grottoes, with the tombs of many popes, and below those the ancient necropolis, visited in small guided groups by advance reservation.

In the apse of the basilica is Bernini's monument of the Chair of Peter. A chair, cathedra, is the sign of a bishop's teaching office, and the feast of the Chair of Peter (22 February) has been kept in Rome since the fourth century. The Pope's actual cathedral, though, is not St. Peter's. It is the Archbasilica of St. John Lateran, across the city, whose facade names it mother and head of all the churches of the city and the world. A pilgrimage about the papacy that leaves out the Lateran has missed the Pope's own church.

Why someone is drawn to it

Some come because they love the Church and want to see her visible center. Some come because they are unsure about the papacy, or have been hurt or confused by something in the Church, and want to look at the foundation rather than the headlines. Some are entering the Church, or returning, and want to say the Creed where Peter is buried.

And many come because of Peter himself. He is the least intimidating of the great saints. He sank in the water, argued with the Lord, fell asleep in Gethsemane and denied Jesus three times in one night. Benedict XVI, preaching on him, said that "the school of faith is not a triumphal march but a journey marked daily by suffering and love, trials and faithfulness," and summed up Peter's answer by the lake as: "Lord, I love you as I am able to love you." People who know their own weakness recognize themselves in him, and find in his story that Christ builds on forgiven men.

The Catholic foundation: what Christ gave to Peter

The pilgrimage rests on three Gospel scenes. At Caesarea Philippi, Simon confesses Jesus as "the Christ, the Son of the living God," and Jesus answers with a new name and a promise: "You are Peter, and on this rock I will build my Church," with the keys of the Kingdom and the authority to bind and loose (Matthew 16:13-19). At the Last Supper, Jesus tells him he has prayed that his faith may not fail, so that he can strengthen his brothers (Luke 22:31-32). By the lake after the Resurrection, the risen Lord asks him three times "Do you love me?" and three times entrusts the flock to him (John 21:15-17).

From these the Church teaches, as doctrine, that Christ placed Peter at the head of the college of the Twelve and that this office continues in the Bishop of Rome. The Catechism says the Lord made Simon alone the "rock" of his Church (no. 881) and calls the Pope the "perpetual and visible source and foundation of the unity" of the bishops and of the faithful (no. 882), language taken from the Second Vatican Council (Lumen Gentium 18, 23).

What the Church has, and has not, said about Peter's tomb and bones

Pius XII ordered excavations beneath St. Peter's, and in his Christmas message of 1950 he announced: "The tomb of the Prince of the Apostles has been found." In the same message he said that bone fragments found beside the tomb could not be proved with certainty to be the Apostle's. Pope Francis, in a letter of 2019, recounted that the excavations later led, in 1952, to a funerary niche covered with early graffiti, holding bones that "can quite reasonably be considered those of the Apostle Peter." On 26 June 1968 Paul VI said the relics of St. Peter had been "identified in a way that we can hold to be convincing," and added that research, verification, discussion and controversy would not end with his announcement.

So the honest summary is this. The Holy See states that the tomb has been found. The popes have called the identification of the bones convincing and reasonable; they have not called it certain or defined it as a matter of faith, and scholars continue to debate it. A pilgrim's prayer at the Confessio does not depend on a laboratory result: it rests on the Church's unbroken memory, from the first centuries, that Peter gave his life for Christ in this city and was buried on this hill. The fuller account, with the popes' own words, is in the answer on St. Peter's bones linked from this page.