The intent of this paper is to address the issue of sustainability within a larger prospectus, that will encompass the built environment. The paper departs from the widely held concepts of natural sustainability to encompass the socio-cultural context as indispensable parts of the urban. The paper will argue that within the bi-folds of the sustained milieu lies urbo-systems: societies, buildings, cultures; that include lessons of sustainability and survival worth of investigation. Within its complex structure, the built environment nourishes communities and together they constitute the complex divine totality, the image of place, the legacy of tradition that transcend space and time. The paper will investigate these urbo-systems, the reasons for their continuity, heritage, the reproduction of patterns and socio-cultural sustainability