Naples is one of the cities with the greatest density of cultural resources and monuments in the world, which testify to its historical-artistic evolution. Its vast artistic and architectural heritage is protected by UNESCO, whose commissions have included the historic center of Naples among the world heritage sites of humanity since 1995 with the following motivation: "It is one of the oldest cities in Europe, whose contemporary urban fabric preserves the elements of its eventful history. The layout of its streets, the richness of its historic buildings characterizing different eras give the site an unparalleled universal value, which has exerted a profound influence on much of Europe and beyond its borders. " On a relatively small territory there are, among others, a large number of castles, royal residences, monumental palaces, historic churches and remains of the classical age, such as to make the city of Naples an open-air museum. Although rich of evidences of the past, Naples is also a laboratory and an important international showcase of contemporary art. Very active in this respect are the PAN - PALACE OF ARTS OF NAPLES and the Contemporary Art Museum Donnaregina (MADRE). More recently, were born "STATIONS OF THE ART", where the city's subway stations, are not conceived as transit spaces, but as a real exhibition space with works by world famous artists. This page, more than a guide, wants to be a hint of some of the major sites of historical and cultural interest that the city of Naples can offer.