Benefiting from its strategic location in the Euralille district, this office building conjugates high visibility and easy accessibility.A bar in movement, of varying thickness, folds, dilates and contracts so as to optimize its occupation of the triangular plot. This modeling of the structure creates open angles for the main entrance and the entrance to the parking garage, located in another volume which is covered with a landscaped garden. Four types of modules of varying widths cover the facade: fixed opaque, opening opaque, fixed glass and sloping glass.The last category, much more utilized on the upper floors, becomes increasingly rarer closer to the ground, where the surface is entirely smooth and transparent. This work of modeling is continued on the roof, where metallic netting conceals the technical equipment and accentuates the streamlining of the volume.