A giant arch spans from one side of the building to the other. It form the main structural support but also the tip of the shape, the characteristic landmark. The orientation of the arch creates a surface that follows the sun path over the day. Clad in solar panels it contributes to the energy used in the building. At the same time it shades the roof terrace with its pool and restaurant. The design was set up parametrically to test many different options in terms of the their shape, floor area and efficiency.