Level 4, situated deep within the prohibited zones of Coruscant's underground underworld, was considered among the deepest levels of the planet. While officially off-limits, it was still attainable. Amilyn Holdo, accompanied by Leia Organa, sought to discover a lost museum believed to be situated at or beneath this level during their time on Coruscant. Their entry to Level 4 was accomplished via passage through a network of pipes.