The Balbis' castle is erected in the rural village of Piovera and it overlooks the little square with its important front. It was built on previous ancient foundations and in the XIVth century the Visconti of Milan made it a mighty fortress, situated on a strategic position near the Tanaro river, along the important "salt road", for the defence of the country. In the course of ages the feud was given to the Spaniards, to the French and finally to the Savoia that gave it to the Balbi of Genova in the XVIII century. Their heirs, the nobles Odescalchi and D’Oria kept the property for two hundred years. From 1967 it belongs to Niccolò Calvi di Bergolo that manages the historical and artistic properties and also the agricultural farmland around the castle with his son Alessandro. Nowadays the castle is an articulated and suggestive building. Its fronts are adorned with terracotta decorations and it has high embattled towers and it is surrounded by a moat and an enormous park with ancient trees. The repairs from fortress into a romantic nineteenth-century residence did not anyway change the original building. The approach to the castle is across a masonry bridge and in the opposite side across a grassy embankment that replaced the two ancient draw-bridges of probable Templar origin.
The castle can be visited from the cellars to the main tower and it is completely furnished. The old buildings opposite the castle were the first houses of the medieval village, later they became the barns of the farm and nowadays they are the location of the Museum of the Ancient Crafts.
The castle is also a cultural centre where a lot of different events take place.