The skyscraper’s shape results from a first planning idea that is still characterising it. The original concept was to realise an iron main structure, widening out toward the base, tapered in the middle point and widening again at the top. This complicated project is made by a nose cone base, composed of two separate buildings that are twisting up till 100 meters height where they join in to a tambour that, keeping on rotating and going to fan out, became the base of the top part of the building: a reverse ovaloid cut with a 45° inclination and with a maximum height of 150 meters.