About twenty years after their creation and ten years after Livio Vacchini's death, his drawings are presented with the force of icons. Vacchini chose to reduce the evocative and seductive power of the drawing in order to search for what precedes it. Drawing is not considered as a representative, descriptive or expressive skill, but as a logical capacity, as a synthesis, as a possibility to reduce to the essential. We cannot do without drawing, but we can reduce its signs to a minimum, in an attempt to grasp what gives rise to the very conditions of possibility of the project and allow the phenomenon to present itself in all its obviousness.