Pope Leo XIV visits Vatican Observatory in Castel Gandolfo, underscoring Church support for astronomy and scientific research.
Newsroom (21/05/2026 Gaudium Press ) On the afternoon of May 19, Pope Leo XIV visited the Vatican Observatory in Castel Gandolfo, reaffirming the Catholic Church’s longstanding commitment to scientific inquiry and its dialogue with modern astronomy. The visit took place in the papal summer residence located just outside Rome, where the pontiff traditionally spends time working and resting.
The visit marked another step in Pope Leo XIV’s engagement with the Observatory, following a previous visit on July 20, 2025—an occasion that coincided with the 56th anniversary of the historic Apollo 11 Moon landing. This symbolic connection between the Church and one of humanity’s greatest scientific milestones reflects a broader Vatican effort to emphasize harmony between faith and scientific discovery.
A Welcoming Reception and Moment of Reflection
Upon arrival at the Observatory, the Pope was welcomed by Sister Raffaella Petrini, president of the Governorate of Vatican City State, alongside Secretaries General Archbishop Emilio Nappa and Giuseppe Puglisi-Alibrandi. Also in attendance were key figures from the Observatory, including its director, Jesuit Father Richard Anthony D’Souza, and his predecessor, Brother Guy Consolmagno, who currently serves as president of the Vatican Observatory Foundation.
The visit began with a brief moment of prayer in the facility’s chapel, underscoring the spiritual dimension that accompanies the Church’s engagement with scientific work. Following this, the Pope met with the Observatory’s diverse staff, including religious, scientific, and lay personnel, acknowledging the collaborative nature of contemporary astronomical research.
A Symbolic Connection to Space Exploration
The Pope’s earlier visit on July 20 carried particular symbolic weight, aligning with the anniversary of the 1969 Moon landing when astronauts Neil Armstrong and Buzz Aldrin first set foot on the lunar surface. That milestone, achieved during NASA’s Apollo 11 mission, remains a defining moment in human exploration and scientific achievement.
By linking his presence at the Observatory with such anniversaries, Pope Leo XIV highlights the Church’s recognition of humanity’s quest to understand the universe. His engagement reflects a consistent message: that scientific progress and spiritual reflection are not opposing forces but complementary pursuits.
Encouraging Future Generations of Scientists
Just weeks before his visit, on June 16, Pope Leo XIV addressed participants in the Vatican Observatory Summer School, held in Castel Gandolfo. Speaking to 24 young astronomers from 22 countries, he encouraged them to embrace both the joy and wonder of scientific discovery.
Drawing inspiration from Saint Augustine’s De Genesis ad litteram, the Pope spoke of the “seeds” that God has scattered in the harmony of the universe, urging the students to share their insights and enthusiasm. The biennial summer program provides advanced training and research opportunities, with its nineteenth edition focusing on the theme “Exploring the Universe with the James Webb Space Telescope.”
The inclusion of the James Webb Space Telescope—operational since 2022 and capable of capturing unprecedented images, such as the Cosmos-Web Field containing nearly 800,000 galaxies—illustrates how the Vatican Observatory remains engaged with cutting-edge astronomical developments.
A Legacy Rooted in History
The Vatican Observatory, one of the oldest astronomical institutions in the world, traces its modern foundation to 1891, when Pope Leo XIII formally reestablished it. However, its intellectual roots extend even further back to 1582, when Pope Gregory XIII commissioned scientific studies to support the reform of the calendar.
Originally situated near St. Peter’s Basilica, the Observatory played a key role in international efforts to map the night sky. However, as Rome expanded and light pollution increased, Pope Pius XI relocated the institution to Castel Gandolfo in the early 20th century, ensuring optimal conditions for observation.
Global Reach and Scientific Innovation
In 1981, the Observatory expanded its global footprint by establishing the Vatican Observatory Research Group (VORG) in Tucson, Arizona. This location provides access to some of the world’s most advanced observational facilities.
A milestone followed in 1993 with the completion of the Vatican Advanced Technology Telescope (VATT) on Mount Graham, developed in collaboration with the Steward Observatory. The telescope pioneered innovative techniques in mirror construction, allowing for more precise and stable observations. Today, it supports long-term research programs and international scientific partnerships.
Continuity of Mission
Pope Leo XIV’s visit to Castel Gandolfo underscores a continuity of mission that spans centuries. From calendar reform in the 16th century to modern astrophysics, the Vatican Observatory stands as a symbol of the Church’s enduring interest in understanding the cosmos.
By engaging directly with scientists and acknowledging the value of their work, the Pope reinforces a message that is both historical and forward-looking: that the pursuit of knowledge—whether through faith or science—remains a shared human endeavor.
- Raju Hasmukh with files from Vatican News
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