Piazza dell'Anfiteatro is a public square in the northeast quadrant of the walled center of Lucca. The ring of buildings that surrounds the square follows the elliptical shape of the ancient Roman amphitheater of Lucca from the 2nd century. The square can be reached through four doors located at the four vertices of the ellipse. A cross is carved into the central tile of the square with its arms facing the four doors of the square.