Construction of St. Peter's Basilica in Vatican City in Rome begins, as Pope Julius II lays the the ceremonial corner stone on April 18, 1506. It was completed on November 18, 1626, replacing the earlier Old St. Peter's Basilica.
It was designed by multiple renowned architects, including Donato Bramante, Michelangelo, and Carlo Maderno, and features a notable dome, atrium, and square designed by Gian Lorenzo Bernini.