For 10 points, name this Italo Calvino novel in which Kublai Khan and Marco Polo discuss the title imaginary locations.
Near the midpoint of this novel, its main characters discuss the nature of stones used to construct a bridge, with one claiming that only the arch matters, and the other retorting that without the stones there would be no arch. One of its sections describes a marketplace where merchants gather at every equinox and solstice to exchange stories. Another of its sections describes a location whose inhabitants believe that their exact duplicates live in the heavens. This novel takes place in the garden of a ruler who believes that his empire is perfectly structured like a crystal. It is divided into nine sections which discuss "continuous" and "hidden" types of the title entities, which have female names and include Eufemia, Theodora, Marozia and Berenice. One of its two main characters describes those entities out of his nostalgia for Venice. For 10 points, name this Italo Calvino novel in which Kublai Khan and Marco Polo discuss the title imaginary locations.
Near the midpoint of this novel, its main characters discuss the nature of stones used to construct a bridge, with one claiming that only the arch matters, and the other retorting that without the stones there would be no arch.
Invisible Cities [or Le Citta invisibli]