 The history of San Marzano, like that of Moasca, Calamandrana, Rocchetta Tanaro and Calosso, is linked to the history of Canelli.All were involved in the struggle between Asti, Alessandria and the Marquisate of Montferrat.From the mid-14th century San Marzano Oliveto was a fief of the Asinari, who also owned Costigliole d'Asti, Moasca and other villages.