Neither past nor present: Authenticity and late twentieth-century architectural heritage

摘要

How long does the present moment last? Where and when does the past begin and how does the present end? In physics - or more precisely in the special theory of relativity - the present can be defined as the coordinate origin in a spacetime diagram ― an unextended point that separates an observer's past and future light cones. From that point of view, the present has no duration at all; the past instantly assimilates the future without any hesitation in between. However, time perception tells us that we actually experience a 'here and now'. Psychologists believe that the time range we perceive as the present, the so-called specious present, lasts about three seconds - the interval duration after which the brain may be said to reset its attention. This is already infinitely more than no duration at all but this recognition is still not enough to explain concepts like the present time or 'today' as an indicator of the contemporary. In the domain of history, the present seems to be a much more complex construction. When we speak of phenomena as contemporary, we place them in an extended present. We concede that the present encompasses the recent past and the near future - a temporal range that provides a stage for the actions and reactions that shape our world.