How did the Pantheon influence Donato Bramante’s design for St. Peter’s Basilica?

The Pantheon served as a primary inspiration for Donato Bramante’s initial design for the new St. Peter’s Basilica.

Commissioned by Pope Julius II in 1505, Bramante’s original plan for the basilica featured a Greek cross layout centered around a massive dome. This dome was directly inspired by the ancient Roman Pantheon, though Bramante’s design notably elevated the structure on a drum to increase its prominence and scale.1

By incorporating the Pantheon’s concept of a monumental, centralized dome, Bramante sought to align his work with the grandeur of antiquity, reflecting the pope’s vision of renovatio imperii (the renewal of the empire). While the final construction of St. Peter’s evolved significantly over the following century—including later contributions by Michelangelo and Carlo Maderno—Bramante’s initial reliance on the Pantheon established the centralized, domed character that remains a defining feature of the basilica today.213