Traditional stone buildings in the Asir region retain one of their most prominent aesthetic elements, namely 'Marv', the shiny white stone that for many decades formed a distinctive hallmark in decorating house facades, embodying the skill of the Asiri builder in utilizing local environmental elements to produce architecture that blends function with beauty. In the past, builders collected 'Marv' stones from mountainous sites, then broke them into small pieces carefully arranged within stone facades to form geometric decorative units adorning doors and windows, extending to the top of buildings in patterns varying between triangles, squares, and vertical and horizontal lines, giving the building a distinctive visual contrast between the whiteness of Marv and the color of dark stones. The use of Marv was not limited to the aesthetic aspect, but represented one of the elements that reflected the architectural identity of the Asir region, as it contributed to highlighting the uniqueness of traditional buildings and demonstrated the skill of artisans in executing precise decorative formations using natural local materials, without the need for manufactured materials or modern techniques. Marv was accompanied by a number of decorative terms famous in Asiri architecture, including 'Al-Kharijah', 'Al-Khidhar', 'Al-Khamshah', 'Al-Shurufat', 'Al-Qadhab', and 'Al-Qatran', collectively forming an integrated artistic system reflecting the taste of the Asiri community, its close connection to the place, and its keenness to add aesthetic touches to its homes. The effects of these decorations are still present in many heritage villages in the Asir region, where Marv continues to serve as a witness to the authenticity of local architecture, thanks to its hardness and natural luster that enabled it to withstand the elements of time and maintain its presence on the facades of historical houses. The growing interest in preserving heritage buildings comes within the framework of national efforts aimed at preserving urban heritage, reviving traditional crafts, and enhancing cultural identity, in line with the goals of Saudi Vision 2030 in protecting national heritage, highlighting its civilizational value, and turning it into a cultural and tourism resource that enriches the visitor experience and passes on the legacy of Asiri architecture to future generations.