The goal of this project was to preserve the heritage aspect of Post-war reconstruction era Malls, which frequently face vacancy and demolition. The concept of Authenticity in heritage was an important factor to consider while transforming the design subject. The final design took into account the authenticity of materials, cultural authenticity and authenticity of concept, staying true to the original ideals of the designers while future-proofing the structure and function of the heritage Mall. In this way, it built upon the strengths of the original design while providing current and future users with possibilities for future reuse, upgrading the building systems and utilizing its huge size as a tool to filter water and produce energy for itself and the surrounding neighbourhoods.