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Sanctuary of San Tiburzio: A Place of Faith and History in the Eternal City

The Sanctuary of San Tiburzio, immersed in Rome’s millennia-old history, represents a place of profound spirituality and Christian devotion. Its history, though shrouded in a thick fog of hypotheses and fragments of knowledge, fascinates the faithful and scholars alike.

Origins and Historical Hypotheses

The origin of the sanctuary remains partly obscure, but it is hypothesized that it was part of a larger cultic complex. Many scholars believe the main building, a sub divale mausoleum, was connected to the nearby sanctuary of Saints Marcellinus and Peter. Indeed, it is thought that the mausoleum may have been erected right above the hypogeal crypt of the two saints, within the catacombs.
The Liber Pontificalis recounts that Pope Honorius I (625-638) had a new staircase built to connect the crypt of Peter and Marcellinus with the mausoleum of Tiburtius. This created a sort of two-level basilica, also integrated with the pre-existing Constantinian church. A suggestive hypothesis, inviting one to imagine the underground pathways explorable in an adventurous search for the vestiges of this complex.

The Cult of San Tiburzio

The central object of worship was the tomb of the martyr Tiburtius, likely located in the above-ground structure. Based on the account of the theft of the relics by Einhard, it is presumed that Tiburtius’s burial place was a mausoleum built above the “ad corpus” basilica of Saints Peter and Marcellinus.
The cult of San Tiburzio would date back to the 4th century, with the first concrete evidence around the year 450. There is no record of collections of ex-votos in the sanctuary.

San Tiburzio: Martyr Among the Catacombs

Tiburtius, a Roman martyr, suffered martyrdom during the persecutions. His memory is linked to that of Saints Peter and Marcellinus, with whom he shares veneration. An epigram dedicated to him, written by Pope Damasus, testifies to the importance of his cult already in the 4th century. Unfortunately, only a fragment with the letters “UR” has reached us, offering a glimpse of the solemnity of the words once inscribed on his tomb.
In the “Passion of Saints Peter and Marcellinus,” it is recounted that a pious Christian gave burial to Tiburtius at the very site of his martyrdom. And a painting dating from the late 4th to early 5th century, found in a cubiculum of region X of the catacombs, depicts Tiburtius alongside Marcellinus, Peter, and Gorgonius, confirming the antiquity of his cult and his connection with the other martyrs.

A Site Abandoned and Rediscovered Over the Centuries

In the 9th century, precisely during the pontificate of Gregory IV (827-844), the relics of Tiburtius were transferred to the Vatican Basilica and placed in the oratory dedicated to Saint Gregory the Great. This event likely marked the beginning of the decline and abandonment of the original sanctuary, destined to fall into oblivion for centuries.

Jurisdiction and Mysteries

The ecclesiastical jurisdiction of the sanctuary is not documented with certainty. It is presumed, as with other extra-urban sanctuaries, that the cemetery in which it was located was legally linked to one of the urban “tituli,” the ancient churches of Rome.
The history of the Sanctuary of San Tiburzio is an invitation to deepen one’s knowledge of Roman Christian history and its catacombs. Those wishing to experience a journey combining faith and adventure can undertake a personal path of research: explore the catacombs of Marcellinus and Peter, search for traces of the original mausoleum, reconstruct, through historical sources, the topography of the sacred place. A journey through time and space, discovering an important chapter of Christian history.