Prefabricated indoor elliptical staircase of reinforced concrete clad in Egyptian Yellow marble with glossy finish. The elliptical staircase is fixed on the rounded wall and the structure repeats its curved lines. The sense of smoothness is enhanced by the railing of stainless steel with a polished finish. The self-supporting steps are of the classic shape and the stair platform is a piano-shaped. The verticality of the stairs ends with two parapets made by semi-elliptic steel profiles, which help to give a modern character to the structure. The whole architectural structure is simple, linear and functional and it adds value to a living space.