INVISIBLE CITIES XXXII -- Cities and Names: AGLAURA

1. Aside from providing a potential pair of names for Calvino's book, what inspiration is there for the account of this particular city in the plot description, or anything else in the description, of the play Aglaura, as put up by Wikipedia?
2. As the others in chapter four, is Aglaura a double city, or a city accompanied immediately by its reflection?
3. Polo's cursory description of the city identifies it as remarkable only by its drabness--by its unremarkableness, yet he claims the periodic and spontaneous appearances of things "unmistakable, rare, perhaps magnificent."  In the context of any other city, would these spontaneities be less remarkable?