The Vatican and Microsoft introduced a new AI-generated version of St. Peter’s Basilica, allowing people to explore this historic site in a unique way. This digital model uses smart technology to help visitors look around the basilica while assisting the Vatican in managing crowds and spotting areas that may need repair.
To create this digital replica, over 400,000 high-quality photos were taken using drones, cameras, and lasers. These images were collected in four weeks when the basilica was empty.
This virtual version will be available online along with two new exhibits inside the basilica, offering both online and in-person visitors an interactive experience of one of the world’s most famous landmarks.
“It is literally one of the most technologically advanced and sophisticated projects of its kind that has ever been pursued,” Microsoft’s president Brad Smith told a Vatican press conference.
Digital access to St. Peter’s Basilica to welcome millions for 2025 Jubilee
The project launched in time for the Vatican’s 2025 Jubilee, a sacred year when over 30 million pilgrims are expected to enter St. Peter’s Basilica through its Holy Door. This is in addition to the 50,000 people who already visit daily.
Pope Francis, speaking to the project’s developers and Microsoft’s president, expressed his hopes: “Everyone, really everyone should feel welcome in this great house.”
Petros Eni Octagon, la segunda parte de la muestra inmersiva que podrá verse en la Basílica de San Pedro, realizada con IA por @Microsoft @iconem #wow pic.twitter.com/6ELyK6ZdpN
— Elisabetta Piqué (@bettapique) November 11, 2024
With this digital platform, visitors can now book entry times, a new option for one of the world’s busiest sites. This could help reduce the long lines that typically form outside the basilica as tourists wait to enter.
At the core of the project is a digital twin of St. Peter’s Basilica, created using advanced imaging techniques and smart technology. Moreover, this digital model allows anyone to “visit” the basilica and discover its rich history from anywhere.
3D model captures 22 petabytes of data, equal to five million DVDs
The highly detailed 3D model, built in partnership with digital preservation firm Iconem, holds a massive 22 petabytes of data—equivalent to about five million DVDs, according to Microsoft’s president.
This technology has already uncovered structural issues, like missing mosaic pieces and tiny cracks, which are invisible to the human eye, with speed and accuracy that surpass human abilities.
Pope Francis has encouraged the responsible use of AI. In his annual Peace Message, he called for an international agreement to ensure technology aligns with human values like compassion, mercy, and morality. He warned that technology without these principles could lead to serious risks.
On Monday, Pope Francis expressed gratitude to the Microsoft team and basilica staff involved in the project. Moreover, he admired how modern technology is being used to share an ancient faith and protect a world heritage landmark, which will mark the 400th anniversary of its consecration in 2026.