When humankind started to exploit their solar system,the planet Mercury at once came into play,because one thing this world as is iron deposits.
In fact most of the core of the planet is iron in one form or another.
With temperatures fluxuating between -170 to +450 living on the surface wasn’t an option.
Human ingenuity really comes forward when there is wealth waiting for the taking,in this case 2 moons were “dragged” out of the orbit of a lesser planetoid,and brought to the orbit of Mercury.
The smaller moon is used for ore storage and repair shops,while the larger moon is where the workers live.
The powers that be called it “Iron City” but we just call it “Mercview”.
from the book"Cities of the Fourth Millenium" by Zorind Rakkmnn 156th printing,translated from the Zinni.*