Description St Peter's Square is a large plaza located directly in front of St. Peter's Basilica in Vatican City. It represents the core of the Vatican City, the smallest state in the world. In the origins, the square used to be the place where Nerone Circus and Gardens where located, and where many Christians, including Saint Peter, suffered from martyrdom.Bernini and Alexander VII worked together on the project of creating a portico, the elegant structure typical of the Greco-Roman cities that protected from the weather. It is this tribute to classic architecture that makes the colonnade the soberest example of the Roman Baroque creations. St Peter's Square took eleven years to build (1656-1667) using 44,000 cubic meters of travertine stone. Those Doric colonnades have 284 16-meter high columns, arranged in four rows to create 3 parallel lanes, the central lanes can be driven down with two pedestrian ones flanking them.