Walled Towns is a cooperative project whose principal aims are to provide a cultural and historical analysis of fortified works. It involves seven European cities, each representing a specific case study: Bad Radkersburg (Austria); Bergamo (Italy); Chania (Greece); Civitella del Tronto (Italy); Eger (Hungary); Segovia (Spain); Vianne (France). Our gathering of historical and iconographic data has been focused on an interdisciplinary approach enabling the exploration of various topics and fields of interest: from landscape information to architectural features, to tourist resources. Our intention is to present a significant range of examples testifying to the peculiarities of the chosen domain of investigation. Indeed, we consider the results of our research as a starting point for an international cooperative effort to study and discuss walled towns. For this reason we are establishing an Internet site in order to exchange ideas, research results and suggestions.