The Viennese railway station Westbahnhof  is more than a railway station.
Well situated it should open up to the surrounding city parts and create a lively plane for urban movements. So we define a spatial order:
1 above the city: building the city above the city
2 in the city: the public space, the view per person per day, the level of movement for travellers.
3 under the city:  the mall
Competition City of Vienna “Vienna railway station west”