Ansaldi Tower (Torre degli Ansaldi)

It's the only tower still remain of the four placed at the four corners of the first order of walls constituted in an elongated rectangle, which protected the "Airali," while a second set of walls, protecting "La Villa," was bordered by two gates dating back to the 10th century: Porta Ottoniana and Porta Maestra.

The jambs and lintels of these two gates are still visible even though they have undergone considerable changes over time.