On the hills stretching toward the Apennines, at an altitude of 300 meters on a rather steep ridge, surrounded by woods and rows of vineyards, lies the town of Montaldeo. From the houses of the village, there is a view of the Alps and Monte Tobbio, which rises to nearly 1,100 meters and is located in the center of the Capanne di Marcarolo Natural Park. Many hiking trails start from the town and wind through the rolling Monferrato landscape.

The first mentions of the village date back to 943, although more reliable documents come from 1202, already discussing political events of some importance. The events spanning more than a thousand years of history are quite complex and involve this part of Monferrato, which is closer to Liguria and thus more influenced by the affairs of Genoese noble families. For those interested in exploring this topic further, it is recommended to consult the Montaldeo guide by Alessandro Laguzzi from the Accademia Urgenze, available online, which provides a thorough historical introduction.

Montaldeo, with its medieval urban layout and still-visible ricetto, is dominated by its castle, first erected in the 13th century and rebuilt a second time in the 15th century.

Around the mid-1500s, the manor was sold to the Doria family of Genoa, who remain its owners and made it their summer residence starting in the 1700s.

Regarding religious buildings, notable sites include the parish church of San Martino, with a single nave in Neoclassical style, featuring a fine pink marble altar and a crucifix used during processions dating back to the 1700s. The 12th-century Church of San Michele, simple, single-nave, and shaped like a gable, contains frescoes from the 1400s, unfortunately not in perfect condition. Finally, near the middle of the village are the Oratory of the Battuti and the Oratory of San Sebastiano.