The listed warehouse in Düsseldorf's Medienhafen was built in 1898/99 by architect Wilhelm Kordt for the de Haan-Carstanjen & Söhne company and was used as a media and studio building in the 1990s. In close coordination with the preservationists, the turn-of-the-century building has been converted into a modern office with restaurant and other uses by sop architekten. It was revitalized and brought back to life in 2019 as the "Kaispeicher" building.

Careful interventions ensure flexible office spaces with barrier-free access. In order to keep the changes to the facade to a minimum and to create optimal lighting conditions, sop architekten designed an atrium with a size of around 100m². It was cut through three floors into the former warehouse providing the floors with daylight. The forecourt, which was little used in the past, has been revitalized with a bistro on the ground floor and a new, spacious grand staircase for seating.