The relationship between city, country and their transformation in the time represents one of the most important theoretical and empirical terrains of observing to build a history of urban and rural sociology in Italy. The affirmation of dualistic spatial relationships in the ‘800 progressively changed with new territorial processes, which interested the consolidation of metropolitan areas, as long as the constitution of a new context, defined by the category of periurban. This object of research represents an element of continuity in a discipline that is often posed in discussion. This evidence permits to define a hypothesis with regard to possibility for the definition of a sociological discipline of socio-territorial phenomena. The proposed research, part of a more general work, was realized by the use of conventional and not conventional sources. This whole of sources permits to cross an important portion of the social and sociological studies on the territorial dimension in Italy, with special attention to criterion of historicity and relevance, and it allows answering affirmatively with regard about the possibility to individuate sociology of territorial phenomena in Italy.