On February 3, 1932, the South eyvan of the Isfahan Shah Mosque experienced a catastrophic structural failure, resulting in irreparable damage to its semi-dome. In the aftermath, Moarefi, a key historical figure, rejected demolition in favor of an approach grounded in the monument’s architectural heritage. This paper raises a critical question: how can a strengthening technique align with a monument’s cultural and architectural significance while respecting its original concepts, construction techniques, and historical values? Through a combined historical and structural analysis, the study explores the “techno-poetic” intervention carried out in 1932, which drew inspiration from the ribbed vault system of the West eyvan of the Isfahan Jameh Mosque, an earlier and structurally advanced model. Using a combination of historical research, onsite surveying, and finite element (FE) analysis, the authors evaluate the structural performance and cultural compatibility of the Shah Mosque’s reinforced eyvan in light of its historical counterpart. Findings reveal that the use of steel I-beams was not merely a technical fix, but a reinterpretation of traditional rib-work adapted to the mosque's specific conditions. The result is an asymmetrical yet historically resonant composition that both stabilizes the structure and preserves its identity. This case study underscores the potential for historically-informed innovation in conservation practice and challenges the prevailing inclination toward demolition in heritage policy.