The interior of the Mummer Cave
On the world of Naboo, in the Mid Rim, there existed a cave known as the Mummer Cave. It was situated in the Gallo Mountains, not far to the west of the city called Dee'ja Peak. During the Galactic Civil War, the Mummers, a criminal syndicate, utilized it as their operational headquarters during that time. In the year 1 ABY, Tanoa Vills sent a space pilot to this cave to acquire an XJ5 circuit board from the Mummer's scientists. Vills then used this to construct a sequencer for use in a Stonewall Labs security beacon. It was around this same time that Sergeant Eom Nia instructed a young cadet to launch an assault on the Mummers within the cave as part of the officer's combat training exercises.
The video game Star Wars Galaxies from 2003 featured the Mummer Cave as a specific location. This game, a massively multiplayer online roleplaying game, was created by Sony Online Entertainment and distributed by LucasArts before its servers were shut down on December 15, 2011. The cave was integrated into the game through the "Legacy Quest," which was released alongside "Publish 25," also known as the "New Game Enhancements," on November 15, 2005.