The new apostolic letter of Leo XIV on Christian archaeology has placed this discipline at the heart of current ecclesial debate. On the occasion of the centenary of the Pontifical Institute of Christian Archaeology, the Pope proposes a renewed look at the material roots of the faith in order to learn to live the present more consciously and to prepare the future with profound understanding.
Far from being a text only for specialists, the document argues that Christian archaeology is a service to the entire Church and to society . Excavating, studying inscriptions, or visiting catacombs is not, according to the Pope, a scholarly retreat into the past, but a very concrete way of educating in memory, hope, and dialogue in a world marked by haste and forgetfulness.
An apostolic letter for a decisive centenary
The apostolic letter stems from the centenary of the Pontifical Institute of Christian Archaeology , founded by Pius XI on December 11, 1925, during the so-called "Jubilee of Peace," when Europe was trying to heal from the wounds of the First World War. Leo XIV recalls that, at that time, the Holy See entrusted the new Institute with the task of guiding, with scientific rigor, the study of the monuments of early Christianity and reconstructing the life of the first Christian communities.
A century later, the anniversary coincides with the current Jubilee of Hope , a context marked by armed conflicts, cultural tensions, and a crisis of meaning. The Pope emphasizes that this coincidence is not merely a calendar event, but a sign that invites us to re-examine Christian archaeology as a tool for peace, reconciliation, and historical clarity , especially relevant for Europe and the universal Church.
In the document, the Pope briefly reviews the history of the Institute: the training of hundreds of archaeologists from all continents, the collaboration with universities and museums, and the participation in emblematic investigations, from the excavation of the tomb of the apostle Peter under the Altar of the Confession in the Vatican Basilica to the most recent work in the basilica of St. Paul Outside the Walls.
Leo XIV also recalls the Institute's close relationship with other entities of the Holy See dedicated to this field: the Pontifical Roman Academy of Archaeology, the Pontifical Commission for Sacred Archaeology, and the Pontifical Academy of the Cultists of the Martyrs. All of them, he affirms, share the same mission : to safeguard and study the material traces of the faith in order to place them at the service of the Church and the world.
Christianity, a faith with its mark on history
One of the central themes of the text is the insistence that Christianity was not born from an abstract idea, but from flesh : from a womb, a body, a tomb. The Christian faith, the Pope emphasizes, is historical at its root: it rests on concrete events, real people, gestures, words spoken in specific languages and in precise circumstances.
Therefore, Christian archaeology presents itself as a discipline that helps us perceive the Incarnation in its material density . By examining tombs, houses, graffiti, mosaics, and liturgical remains, it makes visible that God truly chose to enter history and inhabit places, streets, synagogues, and cities. For Leo XIV, Christian theology cannot be fully understood without a basic understanding of the historical, cultural, and material contexts in which the faith developed.
The Pope also looks to the beginnings of Christianity: the first communities not only preserved the words of Jesus, but also the places and signs of his presence . The empty tomb, Peter's house in Capernaum, the tombs of the martyrs, and the Roman catacombs are examples of a very concrete way of transmitting the faith, which combined preaching, the memory of places, and the veneration of the bodies of those who gave their lives for the Gospel.
This examination of the material traces of Revelation does not idealize the past. The Pope insists that the history of the Church is marked by greatness and frailty, luminous moments and periods of crisis . A theology faithful to Revelation must, therefore, embrace this complexity and allow itself to be challenged by what the archaeological remains reveal of the light and shadows on the Church's journey.
Theology of the senses and school of humility
The apostolic letter describes Christian archaeology as a true "theology of the senses ." It does not limit itself to developing theories, but rather starts from what is seen, touched, smelled, and heard. Fieldwork is, to a large extent, a "tactile" profession: archaeologists are the first to touch, after centuries, buried material that still retains the energy of time.
This sensory dimension, the Pope explains, fosters a less disembodied faith. A theology that ignores archaeology risks becoming abstract and ideological , disconnected from the concrete reality of the People of God. Conversely, when theological reflection is guided by archaeology, it learns to listen to the body of the Church, to examine its wounds, to interpret its signs, and to be affected by its historical trajectory.
From this perspective, archaeology also becomes a school of humility . The archaeologist's work requires paying attention to the smallest details: a fragment of mosaic, a barely legible inscription, a graffito hidden in a catacomb corridor. What seemed irrelevant can, thanks to current methods, reveal crucial information about the daily lives of the first Christians, their forms of worship, or their understanding of hope.
This way of working teaches us not to disregard what seems insignificant and to accept that knowledge always advances from limited clues. According to Leo XIV, archaeology operates on a delicate boundary between history and faith, between matter and Spirit, between the ancient and the eternal , which demands patience, rigor, and a certain intellectual sobriety.
The Pope also links this discipline to a "theology of the senses" inspired by the prologue of the First Letter of St. John— "what we have seen, heard, and touched"—where the Word of life is not an idea, but a reality accessible through experience. Seeking, studying, and safeguarding the vestiges of faith is, in a way, prolonging in history that tangible testimony of the Word made flesh.
Living memory, not a cult of the past
One of the most frequently repeated nuances in the letter is the distinction between living memory and the nostalgic cultivation of the past . Leo XIV warns that Christian archaeology cannot be reduced to the mere preservation of objects or the collecting of remains. Its mission is to bring the past into dialogue with the present, so that what has already been experienced illuminates current decisions and the building of the future.
The Pope insists that the Church is called to educate through memory, precisely when many social contexts are governed by immediacy and the rapid consumption of content. Those who know their own history, he affirms, know who they are, to what tradition they belong, and what hope sustains them . Christian archaeology helps to keep the flame of collective consciousness alive beyond individual memories or fleeting emotions.
Therefore, the document calls for cultivating a “reconciled memory .” Archaeological findings allow us to recognize the plurality of voices and traditions in the history of the Church, revealing both convergences and tensions. Embracing this complexity can become a starting point for a more honest dialogue between generations, cultures, and Christian denominations.
In this sense, archaeology presents itself as a place of ecumenical encounter . Leo XIV points out that the shared catacombs, the churches used by different rites, the similarities in liturgical practices, and the converging martyrologies between East and West form a spiritual and cultural heritage that must be valued together.
All of this leads the Pope to describe Christian archaeology as a knowledge that should not become an elitist and closed discipline , but rather open itself to dissemination, pastoral visits, work with young people and catechists, and proposals that are also accessible to those who approach it from cultural tourism or historical curiosity.
Charity and ministry of hope amidst ruins
One of the most striking expressions in the letter defines Christian archaeology as "a form of charity ." For Leo XIV, excavating and studying the remains of the past means giving voice back to those who have been silenced, recovering the memory of the forgotten, and bringing to light the anonymous sanctity of countless faithful who have been part of the Church without ever appearing in the major history books.
When a Christian archaeologist works on a simple tomb, a painted figure of a worshipper on a wall, or a small funerary inscription, they are attending to the hands that forged those objects, the minds that conceived them, and the hearts that loved them . Behind each relic lies a biography of faith, a liturgy, a specific community with its fears and hopes.
The Pope emphasizes that this discipline thus becomes a school of cultural sustainability and spiritual ecology . In contrast to the logic of use and discard, archaeology teaches us to conserve, interpret, and value what others would have thrown away. Even what seems marginal can "reveal profound meanings" in light of new analytical techniques.
At the same time, Leo XIV understood Christian archaeology as a "ministry of hope ." In the catacombs, in the symbols on the sarcophagi, in the orientation of the apses, and in the funerary art of the early centuries, everything points to the expectation of resurrection and the certainty that death does not have the final word. Reading these traces is to remember that faith has withstood persecution, crises, and changes, reinventing itself and taking root in very diverse peoples.
This capacity of faith to be reborn time and again, which archaeology reveals, leads the Pope to encourage those who work in this field to live their profession as a vocation in service to the Church and humanity . Their task, he emphasizes, is to make visible the Word of life, to show that God became flesh and that salvation has left concrete traces in history.
The Pontifical Institute and its international influence
The letter also devotes considerable space to the Pontifical Institute of Christian Archaeology and its international reach , especially significant for Europe and for countries with a rich ancient Christian heritage. Leo XIV traces its origins back to Pius XI's motu proprio "The Primitive Cemeteries," which aimed to promote serious studies of Christian monuments in order to faithfully reconstruct the life of the first Christian communities.
Since then, the Institute has trained numerous generations of archaeologists of early Christianity, many of them Europeans who have gone on to hold university professorships, museum directorships, or positions of responsibility in the conservation of ecclesiastical cultural heritage. This network of alumni has fostered a strong presence of Christian archaeology in the academic and ecclesial life of various countries.
Leo XIV also highlighted the value of certain courageous decisions, such as holding the 13th International Congress in the Croatian city of Spalato during the war in the former Yugoslavia. In his view, it was a difficult but prophetic gesture , demonstrating how scholarly cooperation on Christian heritage can become a sign of dialogue and a search for peace in conflict zones.
The Pope notes that the Institute has successfully adapted to academic changes, including those stemming from the Bologna Process, without abandoning its distinctive feature: direct contact with sources and monuments . This link between archival research, on-site study, and specialized teaching constitutes, according to the letter, a very valuable contribution to the Church and the scientific community.
The experience gained from excavations such as that of the tomb of Saint Peter or the investigations at Saint Paul Outside the Walls has also made it possible to offer the faithful and visitors of Rome a more precise understanding of the places linked to the apostolic memory , with evident repercussions for pastoral care, religious tourism and the conservation of heritage.
Archaeology, evangelization, and theological formation
In the most forward-looking section of the document, Leo XIV presents Christian archaeology as a primary instrument of evangelization . At a time when many young people are seeking authentic experiences and concrete signs, contact with the material origins of the faith can spark questions, awaken interest in Christianity, and offer a less abstract image of the Church.
The Pope insists that archaeology speaks to believers and non-believers alike, to students, pilgrims, tourists, and specialists. The spaces, images, and traces of the first communities help narrate the history of salvation in a language distinct from that of books, yet complementary and capable of reaching people who might never read a theological treatise.
Therefore, relying on Francis's apostolic constitution "Veritatis gaudium," Leo XIV reminds us that archaeology, along with Church history and patristics, must be considered a fundamental discipline in theological formation . It is not an optional luxury for some faculties, but an essential component if theology is to avoid becoming excessively theoretical.
The document emphasizes that archaeology is not limited to providing data about objects; it speaks of people, their homes, their tombs, their churches, and their prayers . It shows how faith has shaped landscapes, neighborhoods, entire cities, and collective mentalities. Therefore, integrating this perspective into catechesis and preaching can help to better explain what it means to follow Christ in daily life.
Leo XIV particularly encourages bishops, heads of seminaries, Catholic universities and centers of ecclesiastical studies in Europe and other continents to strengthen the presence of Christian archaeology in training programs, and to promote joint projects between dioceses, museums, archives and research teams that allow for greater pastoral and cultural benefit to be derived from the enormous existing heritage.
A genealogy of faith that continues to bear fruit
Throughout the letter, the Pope repeatedly emphasizes that Christians are not orphans . The Church possesses a genealogy of faith, a living tradition, and a communion of witnesses that is also evident in archaeological remains. The mission of this discipline, therefore, is to safeguard, interpret, narrate, and transmit that genealogy.
Recognizing this chain of generations who have believed before us has very concrete consequences: it reinforces the sense of belonging , helps to overcome the temptation to think of faith as a purely individual matter, and shows that the Gospel has gone through very diverse contexts without losing its generative power.
The apostolic letter does not hide the fact that we are living in a time of cultural and spiritual crisis, especially visible in Europe and in societies where religious references are fading. Precisely for this reason, the Pope considers Christian archaeology to be a pedagogical tool for rediscovering our roots without falling into idealized nostalgia or closing our eyes to current challenges.
Leo XIV concludes by addressing himself specifically to those working in this field: researchers, professors, conservators, students, and volunteers. He asks them to continue their work with scientific rigor and faith-filled passion, maintaining a vibrant spirit of service. In his words, Christian archaeology is a service, a vocation, and a form of love for the Church and for humanity , called to make visible, or at least more accessible, the certainty that the Mystery of God has become a historical narrative.
Leo XIV's apostolic letter on Christian archaeology proposes a broad and demanding vision of this discipline: serious research into origins, a school of humility and cultural sustainability, a space for ecumenical dialogue, a pedagogical tool for catechesis and, above all, a ministry of hope that reminds us that faith has left firm marks on history and continues to generate new life wherever it is welcomed with responsibility and gratitude.
