Castelhana 163 is a building with two symmetrical façades overlooking two of Madrid's busiest streets, Capitán Haya and Castellana. Martifer Metallic Constructions' intervention consisted of dismantling the existing façade and creating a new façade, radically changing the building's image. This façade was made from various materials: steel, aluminium, glass, honeycomb and Krion, and also included architectural lighting integrated into the façade.