The building sits in a former industrial site of Lille being reconverted into a business district for young IT companies. The building works as an urban articulation between a large public space and various existing buildings. To sustain the dialogue with these buildings marked by the color and physicality of the brique, the project is distinctively conveived as a light steel and glass construction. The dimension of its structural exosqueleton coincides with the large glass and aluminium panels of the façade. This coincidence intends to create a particular abstraction, as the curtain wall is no longer perceptible as such. In order to relate to the public space, the building was conceived a succession of vertical plans, from back to front. At the back, in linear core integrates all technical fonctions. The front façade includes a loggia, defining the building's public identity, while also serving for climatic regulation. Inside, technical networks are included in the thick floors, so as to free the ceiling and facilitate the evolutive partition of the free floors.