The town is situated on the Montferrat hills, among the Grana and Rotaldo creeks, at an altitude of 262 meters above the sea level, and includes two decentralized hamlets (the latter's formal status as a frazione) in the northern flat side (near Casale Monferrato), recognised in the Statuto Comunale [1]): the first one is Castello, the second one is San Maurizio.

Since 3rd century A.D. they are documented rules of patrician praedials named Medialianus, but also Condius, Contius, accordingly the origin of toponym Contiacus, Conziacanus, Conzianus.

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.

The ruins of ancient medieval structure of the village castle was remodeled in the Franciscan convent building, now at the end of the 18th century, rebuilt to house destined to a rich Count named Carlo Vidua [1]; The villa, which is open to the public, is particularly known for its interior decorations in the Chinese manner.

In 1992, there was a discovery of this interesting historical events, the town has been twinned with Ingham, Queensland, the opening of a thematic exhibition and a quote in memory of the official spokesman of conzanese people emigrated to Australia, Ettore Cantamessa (1892-1947).