Check out Cittadella of Alessandria and learn about its role in defending the area. This structure has witnessed some interesting history during its time.
You'll have sightseeing choices galore when visiting Alessandria. Cittadella of Alessandria is a good place to kick off here, but there are lots of other worthy attractions to explore. La Casaccia, Piazza della Liberta, and Museo della Battaglia di Marengo are close to the history-filled fortress and will top off your day nicely.