Sphere with fifteen circles, with related text, illustrating John Peckham's treatise on the sphere. In the centre is the stationary earth sphere, the Hell Mouth. This is surrounded by spheres of the other elements, moon, planet and stars, all on various kinds of orbital movement. The outer stationary circle is Empyrean, containing the Throne of Soloman. The text refers to the ascent from the centre of the world to the Throne of Solomon in fifteen steps