La Clef de la Magie Noire
by Stanislas de Guaita

In 1888, de Guaita founded the Cabalistic Order of the Rosicrucian. The Rosicrucian Order is a legendary and secretive Order that was first publicly documented in the early 17th century. Guaita's Rosicrucian Order provided training in the Cabala, an esoteric form of Jewish mysticism, which attempts to reveal hidden mystical insights in the Hebrew Bible and divine nature. The order also conducted examinations and provided university degrees on Cabala topics. Guaita had a large private library of books on metaphysical issues, magic, and the "hidden sciences." He was nicknamed the "Prince of the Rosicrucian" by his contemporaries for his broad learning on Rosicrucian issues.