Before the twentieth century and concrete modernity, it was stone that embodied the « well built ». Could sustainable wood one day replace concrete as the archetypal material ? Will it find a place on the scale of values that gives architecture its references, its means of thinking and designing ? The art of adjustment, of well thought-out assembly, would then become the « art of building » par excellence. Architecture would cease to be evaluated by the surface areas it generates and would be measured by the intelligence and inventiveness of its structures. Architectural excellence would be judged by fresh criteria, leading the way to a new alliance of engineering and architecture..