According to tradition, the tomb in which the Apostle Peter was buried after his crucifixion was on the highest point of Vatican Hill. It was on that spot that Emperor Constantine built St. Peter’s Basilica in the fourth century in what is now Vatican City. Many of the greatest artists in history – Bramante, Raphael and Michelangelo – were involved in the construction and decoration of this structure, the largest church in the world. The Vatican recently teamed up with Microsoft to create a stunningly accurate 3D basilica replica powered by artificial intelligence. It combines more than 400,000 photos into a seamless virtual experience through which you can see every inch of the holy space – including intricate details most visitors would never see in person.