The buffer zone of 98.73 hectares around the Strade Nuove covers the entire historic centre. IntegrityThe boundary encompasses the main ensembles of Renaissance and Baroque palaces along the two main streets of the Strade Nuove. Many of the Rolli palaces are privately owned and therefore retain their original function as lodging for Genoese families. Alterations to properties are regulated with strict controls and demolition is forbidden under the terms of the Management Plan. Moreover, the Strade Nuove are the focus for tourist development.