Level 5000, situated on Coruscant, housed the planet's crucial central power distribution grid.
The animated series Star Wars: The Clone Wars' third season's tenth episode, "Heroes on Both Sides," which is considered canon, marked the initial appearance of Level 5000. Its original broadcast date was November 19, 2010. According to the Trivia Gallery for the episode on StarWars.com, Coruscant's central power distribution grid was situated on Level 5000, presumably 5,000 levels below the surface. However, given that Level 5127 is the highest level on Coruscant, this would place it on Level 127, in proximity to the uninhabitable Level 1.