Sith'xana

"What difference does it make if it's the capital of the biggest galactic government ever? It's Gladius' home. That's bad enough."

- Shayden Skywalker

 was the capital of the Gladius Empire starting from 4,030 ABY and homeworld of the Sith. It was covered in one huge megapolis known as the New Galactic City. Darth Gladius, founder (sorry, article not finished)