The Churchillplein is one of the main intersections of Rotterdam. It defines the border between the city and the harbour. The proposed site for the competition is an exception of the grid of the city centre, which demands that every new building follows the orientation of this centre, or of the block itself. To the north of the site an old mansion with its garden is being reconstructed. To the west a little example of Dudok adjoins the Coolsingel. Given the problem to watch the pyramidal zoning-envelope, together with the problem of the orientation of the site, OMA could only base its project on the manipulation of the envelope with the purpose to make the most economic project with the simplest intervention.