In the following pages I attempted to elaborate, in situ, on the conceptual reshapings realized by the concept of ruin and the ruin of concept starting from the question of the legitimacy of their construction. Ruins have an aesthetic, moral, political and religious power supervened on account of what historical, archaeological, epistemological, philosophical and other types of interpretation reorientate which is not conferred by their simple "objectality" but by the concept that includes them which shows a mutual inversion of the conceptual and causative connection of the forming process of ruins. I limited myself to searching how the concept of ruin is formed and the ruin of concepts shows structures which fall into topos (textual sources) and objects from which ruins are taken, without analyzing the multitude of concepts about ruins which require, methodically, separate analyses.
