 Exposed to repeated incursions throughout the Middle Ages, especially the Lombards, Goths and Saracens, old village was totally destroyed, and the new village was built in the 10th century on the top of the hill, with a topographical structure in concentric circles, on ancient places named "Pozzo Piazza" and "bric" (= peak) "Saint Lucia" (= Saint Lucy of Syracuse).The Emperor Otto I of Saxony gave the village in manor to the Lords of Cuccaro; in the same period, Marquis Oberto gift to the Cluniac congregation property for the construction of a little Benedictine Priory, and the decentralized San Maurizio hamlet began to be populated.Since 12th century, Conzano was dominated by the March of Montferrat, in quarrel with the Ghilini dynasty, Lords of Alessandria.