Space in space. In an existing ordination in Salzburg's old town with no room for expansion, space had to be found for an additional sterilization area. The spatial expansion into the outside space was not an option due to the protection of the cityscape, so a space had to be found in the structure itself. This additional space was created by bulging from the treatment room into the existing waiting room created and formulated as a room installation in the form of an upholstered wall with an integrated sofa. The sofa serves as a space-forming element that interlocks both rooms and significantly improves the acoustics of the waiting room. The coloring and rhythm of the upholstery play formally with the floral, historic wooden ceiling. The wavy structure forms a center of gravity, which provides the patient with spatial support as a place of security.