In this paper we deal with the interconnected collectivities. Our principal aim was to define the collectivities and, then, to try to model them by the interconnection and, finally, to measure them. The collectivity is a privilege of the structure (living or non­ living). A collectivity is at least an interconnection. The locality and the globality are, maybe, the most general structure measurements, are the primitives of an interconnection modeling a collectivity. The locality supposes an origin and the globality, a property. The locality is a self-organization round an origin and the globality, round a property. The archirecture, a connection concept between the structure and the function of the collectivity, measures by the degree of the membership to the property, e.g. to the symmetry. By the help of these concepts, self-organization, structure, function, interconnection, locality and globality, we tried to define, to model and to mbsure a collectivity, in most general meaning.