While the families of the Genoese aristocracy had completely renovated many of the old mansions in the historic center, by the mid-16th century the most important families had, through a true land division, built new, richly appointed residences in a run-down area on the outskirts of the city. These residences, consisting of an atrium, courtyard, grand staircase, and garden, were adorned with decorations and paintings by artists of the time. This is how Strada Nuova (today Via Garibaldi) was born.
The buildings initially listed in the Rolli system numbered 162; today, 42, both public and private, are recognized by UNESCO. Among the main ones are: