Schoenborn, W. Keywords: Territory | International law | Borde | Mots clefs: Territoire | Droit international | Frontières | ABSTRACT Walter Schoenborn studies, in his course on the Legal Nature of the Territory, three groups of issues: the interpretations of the legal nature of the territory of the State which prevailed in the main periods of the development of the law of nations; the legal interpretation of the concept of "territory of the State", and the development of conceptions related to the boundaries of th…