Underground Built Heritage in Naples: from knowledge to monitoring and enhancement

Naples has always had a very special relationship with its underground layers:under the 0 level, there is the negative face of the aboveground city; so far, notentirely rediscovered, monitored, or valorized. Those spaces offer the key to adeeper knowledge on the urban history of the city because, even though thisgeological area is not characterized by natural caves at all, all Neapolitan artificialcavities are a testimony to the life of the inhabitants and the skills they adopted tomaximize the potential of the profitable natural location of the city. Nowadaysmonitoring underground networks is fundamental to guarantee the security of thepresent aboveground city, but, at the same time, underground space can also be aresource for future networking, in the respect of archeological layers. Undergroundspace can also be adopted in the definition of cultural routes and canstimulate the creation of virtual tours as well. With such a multifaceted character,a multidisciplinary approach to the underground layers of Naples is required. Thischapter is the result of a multidisciplinary approach to the study of Naples'underground.