The industrial area of Pettoranello, close to Isernia, is located in an ex-wetland surrounded by mountains, tangent to the state route connecting Campobasso to Isernia to the railway. The medieval town of Pesche dominates the valley. On the site is a square shed and the office building. For this latter the client requested a central double-height void with light from above and rooms accessed by distribution galleries over the void. Though these requests suggested the hypothesis of a new introverted and centripetal spatial configuration, the qualities of the landscape called for a more open solution. These intentions have been expressed by using three elements that differ for morphology, chromatism and surface treatment: a ribbon emphasizing first the longitudinal component, defining the entrance and starting a dialectic exchange with the mass of the shed, then the vertical component, detailing the way zenith light penetrates the building; a continuous volume with a circular dynamic; a more massive base that becomes, by folding itself, staircase and roof.