Bernini designed several major public works in Rome, including the Baldacchino and Cathedra Petri in St. Peter's Basilica. He also designed the famous Four Rivers Fountain in Piazza Navona, with figures representing the four major rivers of the four known continents at the time. Additionally, Bernini redesigned St. Peter's Square, adding the iconic colonnades that create an open space and direct views towards the basilica.