The Sakethan civilization was an entity with once had a presence to Calder II.

Caldar II was particularly known for its ancient Sakethan ruins, including burial mounds which were associated with Debrune artifacts. The planet also contained Sakethan glyph stones.

By 2370, a Federation science station on the planet was tasked with protecting the Sakethan treasures from looters. (TNG: "Gambit, Part I")