INVISIBLE CITIES XXIII -- Thin Cities: ARMILLA

1. There is a semi-recurring theme of water, fountains, pipes, wells and windlasses, and the like.  Thoughts?
2. "Lavabo" is a great word, isn't it?
3. If all the cities are just a million impressions or vantages of the same city, what is the point from which Armilla is being viewed?
4. Contrast Armilla to Hypatia regarding Polo's proximity to them.  For example, Armilla: "In the morning you hear them singing" connotes, to me anyway, distance, as opposed to Polo's extended residency in Hypatia.
5. Is there a difference, fundamentally (and perhaps perspective is a required component to this answer), between a city destroyed and a city unfinished?