The Campo sits at the meeting point of the three main roads that lead to and from Siena. That made it a natural neutral ground, a place where political and civic holidays could be celebrated by everyone. It was conceived as an area where the entire population could gather for games, events, and public life. Work to organize the square began as early as 1169. What you see around you was carefully controlled. In 1297, before the civic buildings rose, the city government set down guidelines for how the square and the buildings facing it should look. The statutes spoke of the beauty of the city and the satisfaction of its people. The noble families who lived here, among them the Sansedoni, the Piccolomini, and the Saracini, built palaces with unified rooflines. That was a deliberate statement of decorum, set against the soaring tower houses that were seen as symbols of communal strife. You can still see those towers at San Gimignano, not far from Siena. The square kept evolving. In the Baroque period many of the original towers came down, and balconies with rectangular openings replaced pointed-arch windows on some houses facing the town hall. Then in the nineteenth century, a wish to renovate the city in a medieval spirit brought another round of changes. The Campo you see is a layered conversation between centuries.