The Glorieta Cibeles Tower is a complete up-cycle of an office building abandoned after the 1985 earthquake in Mexico City. The transformation comprised four fundamental axes: structure and resilience; comfort and functionality; aesthetic and tectonic design; and sustainability, in both operational and embodied energy. The intervention converted an old deteriorated tower into a LEED Platinum certified building, achieving savings of 36.5% in total energy, 56% in artificial lighting, 67% in HVAC, 41% in water conumption and a 50% reduction in embodied carbon by recycling the original structure.