St. Peter's in the Vatican has a long and turbulent history. First constructed in the fourth century to honor the tomb of St. Peter, the Early Christian edifice was gradually torn down and replaced by the current structure. The history of the design and construction of this new building spans several centuries and involved several of the most brilliant architects, including Bramante, Michelangelo and Bernini, of the early modern period. This volume presents an overview of St. Peter's history from the late antique period to the twentieth century.