Today we look at the laying of the cornerstone of St Peters Basilica in 1526. It would become the biggest church in the world and its style would influence many others that were built. We explore the difference between a basilica and a cathedral. We look at the claim that it was built over the tomb of the apostle Peter, and the history of pilgrimage there. We also explore how it was funded, and how that could have sparked the Reformation.
