"The People's Basilica" is a 3D replica of St. Peter's Basilica that was made using AI in the Vatican. NBC News' Claudio Lavanga has more on the exhibit and how the model was made.

Using 400,000 high-resolution digital photographs, taken with drones, cameras and lasers over four weeks when no one was in the basilica, the digital replica is going online alongside two new on-site exhibits to provide visitors - real and virtual - with an interactive experience.