The Strade Nuove and the system of the Palazzi dei Rolli in Genoa’s historic centre date from the late 16th and early 17th centuries when the Republic of Genoa was at the height of its financial and seafaring power. The site represents the first example in Europe of an urban development project parcelled out by a public authority within a unitary framework and associated to a particular system of 'public lodging’ in private residences, as decreed by the Senate in 1576. The site includes an ensemble of Renaissance and Baroque palaces along the so-called 'new streets’ (Strade Nuove). The Palazzi dei Rolli offer an extraordinary variety of different solutions, achieving universal value in adapting to the particular characteristics of the site and to the requirements of a specific social and economic organization. They also offer an original example of a public network of private residences designated to host state visits.