central, thus making it possible to respond to the program's requirement for flexibility in terms of layout, partitions and space allocations. Maximum space is of course allocated to the office areas, i.e. part of the first floor and all of the two floors. With its increased ceiling height and enlarged exterior [...] Interspersed between the other three, the Z1 and Z2 buildings are also semi-detached and designed to counterpoint their imposing neighbors. First of all, their geometry is very long: two rectangles of 22 by 56 meters (for a surface of about 3,000 m2 each) which contrast with the 60 by 60 of buildings[...]