An idea by Jonathan Raban in 1976.
The city is self evidently concrete yet fragments and reforms, is malleable, is both populated and a blank canvas to be drawn upon. The real city is made up, not of buildings or of streets or even of people but of our constantly shifting relationships, thoughts, perceptions.
The city is a refuge from the wilderness.
The way into this city is via the sewers.
Here are my shifting perceptions of cities