The Piazza Grande is the most noteworthy medieval square in the city, opening behind the 13th century Romanesque apse of Santa Maria della Pieve. Once the main marketplace of the city, it is currently the site of the Giostra del Saracino ("Joust of the Saracen"). It has a sloping pavement in red brick with limestone geometrical lines.
This photo is not alone…Sergey keeps on jumping wherever he goes
So if you feel like looking at his adventures...