The presence of the individual in the spatial environment is the starting point according to which the preposition in suggests both a spatial definition and an expressive mode that extends to an interiority of space. Interior spaces are primarily defined by a certain structure, meaning the surrounding walls, the floor and ceiling, as well as the openings. Inside of an interior space, the physical presence of the individual meets the materiality of the space and together they co-exist along with the transience of time. In this scheme and likewise, the key of interest is the approach of space from the very limits of its structure towards to the content of objects it holds. Inside a closed space and opposite to objects, the individual is capable of correlating himself with the visual surroundings, thus being an object over them. In the case where the interior space is empty the situation is to be reexamined and the initial condition of the interiority of space reevaluated.

The aforementioned features is the structure of this research work. The subject was studied and elaborated in accordance with the theoretical semantics and critical theory of minimalism, conceptualism and postmodernism of European and American art. The composition of references and examples aims to reinforce further the understanding of interior space, both as a concept and as a spatial fact.