Star Wars Episode 0: The Requel
Coruscant is a small, dense planet in the Core, the surface of which is entirely developed. It is a center for heavy manufacturing and teeming urban sprawl, and is also the location of the Jedi Temple and the Galactic Senate. Vast towering structures form deep canyons between that never see natural light. Old buildings are abandoned and new ones are built on top of them, and this has been going on for a long time.