This area, which was formerly a suburb and has now become part of the centre of Paris, has always housed the warehouses, stores and work areas necessary for the factories, which were able to profit from the barges sailing down the river Seine and, later, the railway nearby, which formed an important and historic trading post for supplies and shipments. The historic building is on three storeys, and was designed as a series of four pavilions. Inspired by the flowing Seine and the walks along the riverbanks, the new project converts the industrial building, leaving the traces of the concrete structure, and includes a lightweight steel and glass web, known as a “plug-over”. The idea is to create a new “dress” to protect the previous reinforced concrete structure and, at the same time, house technological spaces in the folds of this unusual new “fabric” and strengthen the links between the pedestrian tracks that lead to the panoramic roof terrace. Inside, the large windows with steel frames and glass curtain walls are detached from the original structure, giving an overall view of the historic building. The steel frames, with their very strong and narrow sections, mean that very large openings can be achieved enhancing the transparency of the glass and the filigree supporting frame.