In this intense testimony, Eng. Massimo Mariani analyzes the extraordinary resistance of the ancient masonry of Pompeii, emphasizing its structural homogeneity even after millennia and numerous seismic and volcanic events. Campanian tuff, the original mortars, and ancient construction techniques prove to be exceptional examples of durability. Mariani highlights the difference between volcanic and tectonic earthquakes, and describes the ongoing project for the consolidation of the site, carried out with artisanal precision and attention to "visible dynamism." Modern solutions – from the use of stainless steel…