The UNESCO commission decided in 2006 to include Genoa's New Streets and Rolli Palaces in the World Heritage List. The Rolli Palaces are buildings of incredible artistic value, now used for various purposes: museums, banks, offices and private properties.

However, what makes them and the New Streets a treasure of humanity is the role they played in Genoa's architectural and urban development. The New Streets are unique: think of the building complex of a port city like Genoa, which lives overlooking the sea and with the majestic Apennine mountain range behind it.