Endless Galaxy

This unnamed galaxy is the birthplace and gravestone of the highly advanced Endless race, among others. Many stars within it are connected in linear directions by cosmic strings or wormholes, enabling methods of interstellar travel that are simpler than warp drive.

Culture
Dust is the universal currency of the Endless Galaxy for its ubiquitous nature, distinctive appearance and useful traits. It has gained religious fixation in some cultures, though most species in the galaxy prefer to revere the Endless or Lost races that were so proficient with it. This can be justified by that many of these races were created by them, or the accidental uplifting by Dust.

Behind the scenes
The Endless Galaxy was implied by flavor text in the first Endless Space game to be the milky way, this is non-canonical and has been repeatedly contradicted in every other installment. A continuity error in early versions of Endless Space 2: Awakening brought this back by placing Earthly continents on Sobra.

The class of the Endless galaxy is deliberately up to the player. In most scenes it is depicted as a spiral galaxy, one artwork suggests that it's a cluster of merging galaxies.