There are innumerable gaps all over the city, with walls that do not exist in other cities, so that there are these empty ...unoccupied places in between ...barren land, derelict land, even in the inner city areas, ...places where nothing happens. ...There used to be a place in Berlin where we put a circus for a film.

(Wim Wenders, in Jacques Derrida, Kurt Forster, and Wim Wenders, "The Berlin City Forum Symposium", Architectural Design, 62, p 53)