The arboreal planet Tholoth was a temperate and warm world, located along the base of the Slice in the Colonies region of the galaxy. Outside of the cities, the Tholothian planetary government designated great swathes of land as wildlife preserves. Keeping large industry on other planets in the star system, Tholoth remained an idyllic garden world free of the pollution of other highly populated planets. Tholoth’s axial tilt caused the night’s sky to be filled with the bright light from the Deep Core for half of the year, and the dark, muted brilliance of the galaxy’s arms.

Benefiting from the trade and immigration that flowed from the Core Worlds, the native Tholothians quickly implemented strong policies to regulate the flow of extraterrestrial visitors to their world. Insisting that the influx of new visitors integrate in a ecologically-minded way, the Tholothian cities grew their cosmopolitan charm by incorporating foreign architectural styles with a distinct Tholothian twist. This blend of styles helped Tholoth remain distinct from the urban sprawl of the ecumenopolises across the galactic core.