Abstract: This research aims to develop the formative vocabulary of the architecture of the ancient city of Ghadames and reformulate it through a contemporary design vision that contributes to enhancing the Libyan architectural identity, by moving from the method of literal transfer of heritage elements to an approach based on analysis, abstraction, and re-employment. The study stems from a problem represented by the decline of the visual identity of local architecture due to the dominance of imported architectural models and the weakness of scientific methodologies that link heritage with the requirements of contemporary design. The research adopted the descriptive analytical approach to study the formative vocabulary of Ghadames architecture and analyze its aesthetic, functional, and environmental characteristics, in addition to the applied approach for developing these vocabularies and reformulating them into contemporary design models, based on Shape Grammar analysis. The study included an analysis of the geometric, spatial, decorative, environmental, visual, and cultural vocabularies, such as arches, vaults, the internal courtyard, covered passageways, wall triangles, gypsum decorations, colors, while explaining their design values and the possibilities of employing them in contemporary architecture and interior design. The results revealed that the vocabulary of Ghadames architecture possesses formative flexibility that allows its reinterpretation and development without losing its authentic identity, and that the employment of abstraction and modification principles contributes to producing design solutions that combine authenticity and contemporaneity and enhance environmental performance and sustainability. The research recommends adopting design methodologies based on re-reading heritage and transforming it into a contemporary architectural language, in a way that supports the preservation of the Libyan architectural identity and enriches modern design practices......... Keywords: ........Formative vocabulary – Architecture of the ancient city of Ghadames – Contemporary design vision