One of the finest examples of modern design in office buildings in Mexico City is this nine-story structure, also in collaboration with Augusto H. Álvarez. Construction is reinforced concrete, using a concrete pile foundation system. The symmetry of its form, an upright, seemingly weightless slab, its floor-to-ceiling sliding glass walls, set it apart from the average office building. Through the use of adjustable interior walls, the floor space can be arranged to meet the tenants’ requirement. The building is air conditioned. Unfortunately, the southeast and southwest walls are blind, due to adjacent property. Commercial premises occupy the ground floor.