As part of the revitalization, we carefully renovated the building’s exterior, ensuring its historical integrity was preserved through close consultations with heritage authorities. The Obernkirchen sandstone of the facade along Rödingsmarkt was cleaned, and the windows were replaced with insulated profiles that match the original design. We also restored the main entrance and staircase leading up to the raised ground floor back to their original positions, aligning them flush with the facade. By adding insulated copper roof cladding and skylights, the attic – which had previously only been used as an archive – was transformed into an office floor. On the fifth and sixth floors, the dormers were replaced with large studio windows that overlook the inner courtyard, enhancing the old Kontorhaus with new light and spatial qualities. The other four office floors, each around 1,000 square meters, were completely gutted to restore the building’s original modern features: open floor plans, views in all directions, and ceiling heights of up to 4 meters.