Agrippa and De occulta philosophia: the handbook of talismans
Heinrich Cornelius Agrippa and De occulta philosophia (1533): the genesis of the work, its three books, squares and seals, the spurious Fourth Book.
In 1510 a young German scholar sent Abbot Johannes Trithemius a manuscript in three books on occult philosophy. His name was Heinrich Cornelius Agrippa von Nettesheim; he had been born in Cologne in 1486 and had already travelled across Europe as a soldier, secretary and teacher. That manuscript, reworked for more than twenty years, would become the most influential handbook of Renaissance magic and the main source for most of the talismans we know.
A book with a long gestation
Trithemius, formerly abbot of Sponheim and by then in Würzburg, replied with a letter of encouragement, urging caution in divulging certain knowledge. Agrippa did not publish at once. The first book appeared in Antwerp in 1531, and the complete work was printed in Cologne in 1533, despite the opposition of the local inquisitor. The final text was far longer than the first draft and gathered quotations from ancient, medieval and contemporary authors.
In the meantime, in 1530, Agrippa had published De incertitudine et vanitate scientiarum, in which he harshly criticised every discipline, magic included. This apparent retraction has divided interpreters. Some read it as a genuine change of mind, others as a form of caution or as a rhetorical exercise in the sceptical manner. The coexistence of the two books remains one of the most debated problems of his intellectual biography.
The structure of the three books
Agrippa divides magical knowledge according to the three worlds of Neoplatonic cosmology. The first book deals with natural magic, that is, the hidden virtues of stones, plants and animals. The second tackles celestial or mathematical magic: numbers, geometrical figures, harmony, astrology. The third is devoted to ceremonial and religious magic, to divine names, angels and the Kabbalah, which Agrippa knew mainly through Giovanni Pico della Mirandola and Johannes Reuchlin.
It is in the second book that the planetary squares appear with their seals, together with the astrological images of the planets and signs and the figures of the decans. Agrippa does not present them as his own inventions but as a legacy of the ancients, referring to Greek, Arabic and Hebrew sources. Many of these attributions are questionable, but the book worked as an extraordinary anthology of the tradition, used for centuries by readers of every persuasion.
Fortune, forgeries and legends
Its success was immediate and lasting. De occulta philosophia was reprinted several times and translated into English in 1651. After Agrippa's death in 1535, a so-called Fourth Book also circulated, published in 1559, which claimed to complete the work with ritual material. His pupil Johann Weyer, a physician and famous critic of the witch hunts, declared it spurious, and modern scholars agree with him.
Agrippa's fame also grew through legend. The historian Paolo Giovio helped spread the rumour that the black dog who accompanied him was a demon, and literature turned him into a model of the Faustian scholar. As late as 1818, in Mary Shelley's Frankenstein, the young Victor becomes enthralled by reading Agrippa, a sign of his place in the European imagination.
Beyond the myth, Agrippa's treatise remains a fundamental document for understanding how the Renaissance tried to bring philosophy, religion and natural science together into a single system. Modern critical editions make it possible to compare the 1510 draft with the printed text and to follow, page by page, the development of a restless and far from dogmatic mind.