The monumental character of the classic city edifice is refined by emphasizing the major lines of the building; big windows, generous storey heights, continuous and generous spatial arrangement, and clear structures.

The building's original atrium has been reopened right down to the street level, with a new glass roof and skylights. The atrium represents the heart of the building, where new vertical communication, with escalators and elevators, move the public through the open courtyard to the upper floors of the commercial areas. On all storeys around the atrium there are open galleries with good circulation flow and visual contact between floors. Existing structures are retained and reinforced with marked and monumental columns.

Along both façades – towards Karl Johans gate and Kirkegaten – new public entrances have been established. The listed cellar with cross-bow vault is reopened to the public, with access from the street. Expansive windows have been retained on both façades to create a visual connection with city life at all levels.

In the new roof construction, a double height office space opens up to the city’s skyline through the use of floor-to-ceiling windows. A brand-new roof terrace with spectacular panoramic views connects with the surrounding city and roofscape. The sloping roofs are covered in copper, with vertical copper fins that hide the window openings