In September 2007, the museum invited eight architecture firms to research about to extension’s Museum. Among these, three German architects: KuehnMalvezziArchitekten ; schneider+schumacherPlanungsgesellschaft ; WandelHoeferLorch + Hirsch Müller and five foreignarchitects : DillerScofidio + Renfro (New York) ; Gigon/GuyerArchitekten (Zurich) ; Jabornegg & PálffyArchitekten (Vienne) ; Sanaa / KazuyoSejima, RyueNishizawa & Associates (Tokyo) ; UNStudio (Amsterdam). The mission of thesearchitectswas to conserve the memory of this place. The jury presided by Louisa Hutton (Sauerbruch & Hutton) announcedthe winner in February2008:schneider+schumacher.
To better respect the historicmuseumbuilt in 1815, an extension of 4 151m2 wasbuilt in underground. Hisfacadeiscomposed of 195 portholeswhichspringfrom the soil. The portholes have a diameterbetween 1,50m and 2,50m. The architectsfromschneider+schumacherplaywith the topography to animatethisfifthfacade and to create asignage for the museum. As a result, a big galleryof 76mlong and 53mlarge with 8,20m height at the central point.
There is no need to look fora door to this building, once again, the entrance is underground, more specifically by following a stair in the axis of the main museum. This gallery is partitioned by a tall wall flushed the ceiling. German architects choose white to fade in front of the painting.
The porthole symbolizes the “eyes of the art”. They were specifically built for this museum by Licht Kunst Licht. The renforced glass permit to pedestrians to walk on themwith care. This portholes permit to control the interiorluminosityduring the day, withelements to attenuate the light source. Next during the night, LED Lightingact in opposite to display a neccessarylighting for the gallery.Eachporthole has itsownlighting system whichauthorizes aspecific type ofscenography.
The floor of the Städel Museum wasn'teasy to build. In fact, groundwaterislocatedunderthismuseum. Therefore, the building isweighteddown by 160 stakes to preventitfromfloating. Themain structureishiddenfromthe visitorsbecauseof 12 renforcedconcretecolumns. In addition to the stakes, 32 drilling site of 82m in depth to the geothermal. The producedenergyisthendistributedamongflooringheating.
Once afterthe roofing iscompleted and the support deployed, a frame of wooden model will cover the roofing of the gallery. A early slab wascreated to form the roof of the gallery. A second slab has permittedalinkbetweenall panels and constituted the support of the roof. Next, a watertight support wasinstalled at eachof the portholescovered by a landscaped roofing.
The building costwas 52 millions €. The museumhad a chance to benefitfromsomeaidsuch asa local privatefamilybanker (3 million euros for the construction and 3 million for the museumfoundation).
Client: Städelsches Kunstinstitut
Location: Frankfurt-am-Main, Germany
Project Manager: Michael Schumacher, Kai Otto, Till Schneider
Construction chief: Hans Eschmann
Team: Miriam Baak,e Christoph Bonke, Karlo Filipovic, Manuel Mauder, Vita Redliha, Iva Resetar, Miodrag Stojsic, Felicitas Adler, Gerhard Breuss, David Bujanowski, Mark Delle, Diana Djekic, Florian Haus, Kerstin Högel, Miriam Huesgen, Patricia Kaufmann, Johannes Klorer, Florian Mieden, Carsten Nawrath, Wolfgang Schneider, Joachim Schulze, Sebastian Stange, Christopher Unger, Tim Unnebrink, Ragunath Vasudevan, Alexander Volz, Volker Westmeier