The Sphere of Sith Philosophy, also known as the Ministry of Sith Philosophy and the Pyramid of Sith Philosophy, was one of the twelve Spheres of Influence in the reconstituted Sith Empire. The pyramid was concerned with upholding the Sith code among the Sith Order and the denizens of the Sith Empire. Sympathizers of the light side would be hunted down and rooted out, regardless of their force sensitivity. This included those who wished to proselytize alternate philosophy or theology that directly contested with or challenged the validity of the Sith. The Sphere was also responsible for spreading anti-Jedi sentiment and dictating the 'proper' way to practice the Sith code. During the Cold War with the Republic, Darth Aruk—the Dark Councilor in charge of the Sphere—worked to destroy the Revanites for spreading their teachings across the Empire.
- Star Wars: The Old Republic Encyclopedia (First mentioned)