Vanguardia Offices that located in Santiago, Chile, was designed by Gonzalo Mardones. The intercropped office spaces and circulations are interspersed allowing an interconnected series of spaces and spatial variety. The architectural space is enhanced through a functional poly-space. Besides the use of the roof through the fifth façade (term coined by Le Corbusier), the building provides the basement with light wells that serve to expand the reach of natural light. This, the architects have defined as the ‘sixth façade’, aimed at the sky. The vertical light allows the use of sustainable underground ventilation and light. The concept of the ‘seventh façade’ includes the idea of using mediators in architectural terms, removing closed framing elements from site to site.
Natural light is used as the most important material, since the light models the architectural space. Opting for the use of light in both horizontal and vertical forms of the building ensures all venues including circulations have natural light for at least ten hours, covering all the hours that the building is used.