I was googling some things for my Mass Effect short stories, and I came across something called the Stanford Torus. Stated simply, it's a specific type of rotating ring space station. Nothing particularly unique about that in space station concepts. Except... this is the interior:
So if we just take a look at the Stanford Torus next to Mass Effect's Citadel Presidium...
Stanford Torus:
Presidium:
Stanford Torus:
Presidium:
But wait! There's more!
Meet the
Kalpana One Space Settlement concept.
Well, you can't tell me the Mass Effect team didn't do their research.