The concept of ‘ars’ in antiquity identified a knowledge of rules through which products are made. The term work of art evolved over the centuries in a definition that corrupted the original one, linking itself to the so-called ‘beauty’ theory. Such a mutated definition has been used for the monuments, assuming a history transcending value whose interest is uniquely given by its figurative features, neglecting the structure. The monument, including its constituting structure and materials, instead, is an artwork in a broadest definition, not exclusively linked to esthetical value but above all to the experiences (the history) supported by the suffered signs, values and non-values. The structure is connoted by an identity, expression of precise values, to be integrally conserved, including materials, constraints organization, in general static scheme, essential documents for the history of architecture and science.
Keywords: Monument; structure; conservation