Roggendorf-Haus, Former warehouse in Düsseldorf harbor, Germany

The Roggendorf-Haus is an architectural structure in Düsseldorf located at Speditionstraße 15a that rises across multiple floors in the harbor's industrial district. The building occupies significant space and now serves different purposes while maintaining its place in the district's built landscape.

The building originally functioned as a warehouse for Josef Roggendorf's company until 1996, when the city of Düsseldorf took over its management. This change of ownership marked the beginning of its transformation toward new uses.

The nickname "Flossi-Haus" comes from the 24 climbing figures by Stuttgart artist rosalie, first shown in 1998 at the NRW-Forum and given to the city by Klüh Service Management in 2002. Each figure is a one-off, up to 4.2 m tall and 2.5 m wide, spread over roughly 800 m² of facade. They were removed in May 2018 because moisture and corrosion threatened to break them.

The upper floors are now home to a startup center and are accessible to visitors during operating hours. It is best to confirm opening times beforehand since the space is designed primarily for business activities.

The 24 Flossi figures were donated to the city in March 2002 by Klüh Service Management after being shown at the NRW-Forum in 1998; each is a one-off, up to 4.2 m tall and 2.5 m wide, and weighs about 150 kg. Removal and transport in 2018 was budgeted at roughly 17,500 euros.