Light, Darkness & Mansions of the Moon
An image showing two astronomers/astrologers staring in wonder at the secret meaning they have found by observing the position and phases of the moon, commonly referred to as the lunar mansions. This image comes from the dust jacket of Volume II of the Picatrix, recently published by Oroboros Press (http://www.bibliomancer.blogspot.com/), who makes some researched esoteric texts.
The four elements and a relation of light and darkness depicted through a representation of the tetragrammaton. Reproduced from an unnamed text by Robert Fludd. From a Czech picture book called Hermetismu, Trigon Press.