From the relationship between environment and the house, I try to carry out an approximation between Winnicott’s psychoanalysis and architecture. In fact, the winnicottian approach of the object-subjective concept allows us to think of a motherbaby fusion stage that can be paralleled to that of individual-home or individualcity in adulthood. Human beings cannot be without a habitat, as Winnicott showed, and deep psychopathology characterised by unthought anguishes might result from a failure in the individual’s process of installation in the world. Since it is the only art really able to shelter, i.e., able to concretely constitute itself into an environment through its essential, involving capacity, much before it might even be taken as an object of representations and desires, how deeply may architecture affect human existence?