a circular square, with a diameter of 100 m, dating back to 800, located at the intersection of three very important roads: via Guido Monaco (1870), via Petrarca and via Roma. At the center of the square is the monument, by Salvino Salvini (1882), to Guido Monaco (or Guido D'Arezzo), the creator of modern musical notation and tetagram. Point 16: See the Map »