The horizon is the primal DATUM of all dwelling. It is the reification of the elemental link between the internal mechanism of perception and external realm of physical reality. It is what links us intimately to our surroundings. Throughout history, surroundings change, technologies change, languages change, cultural and expressive imperatives change, but what architecture must respond to now is the changing nature of the primal conditions of the medium itself; that of perceptual and psychic references.