The ancient Sith species built numerous burial valleys on Korriban, including the Valley of Golg, a location established a significant time prior to approximately 200,000 BBY. This specific valley gained importance as it housed the tomb of Dathka Graush, who was a Sith King.
Sorzus Syn, a Jen'jidai, documented in her 6900 BBY chronicle that the structures within the Valley of Golg were present well before the rise of the Zhell civilization on the planet Coruscant.