The charm of living in an old building, coupled with Berlin's housing scarcity and the sustainable mindset of utilizing existing structures as much as possible, has encouraged many city residents to purchase and renovate historic buildings. These buildings, often characterized by their high ceilings, provide opportunities for multi-level use, enabling creative spatial solutions that maximize the available volume. A key element in such renovations is the staircase, which not only serves a functional purpose but also takes on a sculptural identity, adding architectural elegance to the interior. A lightweight staircase design, in particular, helps preserve the building's historic character while seamlessly integrating modern functionality, ensuring that the old building retains its unique charm while meeting contemporary living standards.