The area of Robbio has been settled since
Neolithic times. A Roman centre named
Redobium is attested by
Pliny the Elder. Later it was a
Lombard town and, later, a possession of the Catholic
diocese of Vercelli. Around the 11th century, it was acquired by the De Robbio family, who ruled it, together with the neighbouring area, until the 13th century, when it was contested between Vercelli and
Pavia. In 1220, the latter definitively acquired it through a diploma issued by
Emperor Frederick II. Then part of the
Duchy of Milan, it was entrusted to several feudal families. In 1748, it was acquired by the
Kingdom of Sardinia and, in the 19th century, it became part of the province of Pavia under the newly formed
Kingdom of Italy. ==Main sights==