The form made of copper utilized in the various versions of Verticale (Vertical), of which some examples are on display in this room, recalls that of a column and constitutes a base on which different objects made of different materials (wood, iron, copper, tin, ceramic, glass containers filled with mercury or water) are set each time.
Copper belongs to the world of metals, which for the art- ist have a close relationship with the human dimension.

They are part of harmonious cycles in which what interact are primary ele- ments like water, color and the seven metals — lead, tin, iron, cop- per, mercury, silver, and gold — which are present in his works on a regular basis in various ways. The use of metals in Salvadori’s work alludes to alchemy, understood as the transformation of opposites into likes, as communion in the form of different states of matter and of the psyche, as the elevation without separation of the phys- ical and the sensible toward the supernatural and the ethereal. In all these cases it is the process of change and transformation that lies at the root of any intellectual growth.