Abstract
Architecture represents the intellectual identity, the level of creativity and esthetics of human being in any place whereas those features usually correspond to that place in particular. Both the Nubian Architecture in Egypt and the Najdi in the kingdom of Saudi Arabia utilized the triangular shape as a geometrical composition in elevations. The utilization of the triangular shape in those traditional architectures made most architects utilize it as a geometrical element in the design of the contemporary designs to interpret the architectural style and feature in both regions in spite of their different geographical locations. Thus, the importance of the research appears as a trial to comprehend the relation between the architectural feature representing a certain place and the configuration of elevations and design to maintain the sustainability of buildings through its external envelop that determines its interaction with the surrounding environment and presents its relation to the different heritage aspects.