Cantù is a city and comune in the Province of Como, located at the center of the Brianza zone in Lombardy. It is the second largest city in Brian…Cantù is a city and comune in the Province of Como, located at the center of the Brianza zone in Lombardy. It is the second largest city in Brianza. The name could stem from that of the Canturigi, a population of Insubria of the 6th century BC. A village was founded here by Gauls in the following century, which was conquered by the Romans in 196 BC.