Prefabricated elliptical staircase of white composite material with a railing of polished stainless steel. The staircase and the railing with a handrail are of modern linear and essential shapes. The self-supporting steps of white color are clad of an innovative and durable material, which is easy to maintain. The staircase is based on a rounded and plastered wall, which gives contrast to the pure white color of the steps. The whole architectural structure is a real furnishing element.