KotOR - The Coming Storm
Coruscant , originally called Notron, is a planet located in the Galactic Core. It is generally agreed that Coruscant was, during most of galactic history, the most politically important world in the galaxy. In controlling Coruscant, governments controlled most of the galaxy in the process.
Over the centuries, Coruscant had developed into an ecumenopolis, with a total of 5,127 levels of city built up from the crust. The actual planet-wide metropolis of Coruscant was called Galactic City. Under the Galactic Republic, the names Republic City or the City of Spires were also used to reference the city. However, in practice, Galactic City and its other names were sometimes applied to the Senate District, the central government center and de facto capital of Coruscant.