At the center of the ellipse of Saint Peter's Square (Piazza San Pietro) stands an Egyptian obelisk of red granite, 25.5 meters tall, supported on bronze lions and surmounted by the Chigi arms in bronze, in all 41 meters to the cross on its top. The obelisk, of the 13th century BC, was moved to Rome in AD 37 by the Emperor Caligula to stand in the central spina of the Circus Gai et Neronis, which lay to the left of the present basilica.
