The Clavicula Salomonis — Key of Solomon — is not one book but a family of manuscripts, copied and modified across centuries, claiming to transmit the magical wisdom of King Solomon as taught by an angel and passed to his son Rehoboam. The oldest surviving manuscripts date to the 15th century, though the tradition they represent is considerably older. More than any other single text, the Key of Solomon defined what Western ceremonial magic looks like: its circles, its pentacles, its planetary hours, its spirit names, and its elaborate ritual preparation.
The text is divided into two books. The first covers the preparation of the magician — the ritual purity, fasting, prayer, and timing required before any operation — and the tools: the circle of protection, the triangle of art, the knife, the wand, the lamen, and the other implements that subsequent grimoire tradition would standardise. The second book contains 44 pentacles — magical talismans attributed to the seven classical planets — each illustrated with Hebrew divine names, angelic names, and specific sigils, and each assigned particular magical effects.
The attribution to Solomon is a pseudepigraphical convention — giving a text authority by placing it under the name of a legendarily wise figure. The actual contents draw on Jewish angel magic (the Hekhalot and Merkabah traditions), Arabic astrological magic (the Picatrix tradition), and the general Mediterranean magical heritage that circulated in the medieval period. The text is not Jewish, not Arabic, and not specifically Christian — it is the product of a cross-cultural magical tradition that moved through all three civilisations.
The Key of Solomon shaped the entire Western grimoire tradition: the Grimorium Verum, the Grand Grimoire, the Heptameron, the Arbatel — all draw on its framework. When the Golden Dawn codified ceremonial magic in the 1880s and 90s, the Key of Solomon was one of their primary sources. When Crowley published his magical works, the Solomonic tradition was their structural foundation. Modern Solomonic magic — currently experiencing a significant revival — works directly with the Key's pentacles and procedures.
Solomon was endued with divine wisdom by God and instructed by angels. He caused the spirits to serve him, bound the evil and made use of the good, and by this means brought to light all knowledge, all secrets, and all arts.
— Clavicula Salomonis, preface