To build in a historical city demands a meticulous choice and use of material, and a more important thing, the adoption of an attitude about it. The attitude in this case is the choice of coexistence instead of mimicry, from a construction of concrete and steel, sensitive with the place, attentive with the historical memory, and coherent with contemporary needs. A strong concrete shell protects the inside, and allowed to complete the excavation comfortably outstanding the perimeter forces. Its effort is shown naturally as the interior texture. The use of cort-en steel flats allows to delimitate the area, to articulate the walkarounds, and to preserve the findings.