This is a reproduction of a talisman design found in the "Key of Solomon", a grimoire of ceremonial magic attributed to King Solomon. Containing influences of Hermetic alchemy, Roman Astrology and Kabbalah, Solomon's magic is a cornerstone of the Western Esoteric occult tradition. The grimoire explains: "It serveth to invoke the Spirits who are under the Firmament." Samuel Liddell MacGregor Mathers, a ceremonial magician and editor of the most common edition of the book, further describes: "Letters forming the Names of the Spirits Yekahel and Agiel."