A space station concept for Destiny's center looks to me like a variation on Mass Effect's citadel.

As Destiny shifted from pure fantasy to more science fiction, Staten says they moved the idea of the center of the world from a city on the surface to a spaceship.

Another image from Destiny's time as a more pure fantasy game. This city was imagined to be Destiny's center, a bright citadel beseiged by evil forces that the player would defend.

Art Director Christopher Barrett:

"If you take an image like this one, with ancient ruins up on a hill, kind of a classic fantasy scene, it asks the question, 'what's buried beneath those ruins?'"