“The Devil’s Bible”: The Legend Of The Monk Who Sold His Soul To Satan 

“The Devil’s Bible”: The Legend Of The Monk Who Sold His Soul To Satan 

Did the illustration of Satan on the book’s cover inspire this strange tale?

Housed within the national library of Sweden in Stockholm, is a mysterious religious context with a wicked reputation – The Codex Gigas (English: Giant Book) is the largest extant medieval illuminated manuscript in the world, at 92 cm (36 in) tall. It is also known as the Devil’s Bible because of a very unusual full-page portrait of the devil, and the legend surrounding its creation.

It was created in the early 13th century in the Benedictine monastery of Podlažice in Bohemia (modern Czech Republic).

The legend goes like this…

A Benedictine monk living in the monastery of Podlažice was sentenced to the particularly cruel death of being walled up alive after breaking his vows. In a desperate attempt to avoid his punishment, he promised he would create, in a single night, a book that glorified the monastery and contained all human knowledge.

The abbot, out of mercy, couldn’t but accept the man’s proposal. But near midnight, the monk realized he could not complete the task alone, so asked the devil to help him finish the book, in exchange for his soul. The devil completed the manuscript and the monk added an image of the fallen angel in the book, allegedly out of gratitude for his aid.

Of course, this is only a legend. Several tests have revealed that the calligraphy alone – not taking into account the illustrations and other embellishments of the manuscripts — might have taken at least five years of non-stop writing. The so-called “Devil’s Bible” is actually the famous Codex Gigas (Latin for “Giant Book”), probably dating to the 13th century.

The name Gigas might be due either to its exceptionally large dimensions (it runs 620 pages and three-feet from the top of the spine to the bottom) or to the vast number of works collected in it. The Codex Gigas is much more than a Bible. It includes the Old Testament, the New Testament, an incomplete copy of the Vulgate, the Chronica Boemorum of Cosmas of Prague, two works of the Jewish historian Flavius ​​Josephus, the Etymologies of St. Isidore of Seville, instructions concerning exorcisms, some medical treatises of Constantine the African, the Rule of St. Benedict, a calendar, a list of benefactors of the monastery, and a long list of  “rarities” including scientific and alchemical sketches.


The curious image of a demon on one page of the Codex Gigas gave rise to rumors that the devil had a hand in creating the remarkable book.

It should not surprise us that science and alchemy — which today we might think of as the opposing worldviews of reason and magic — are present side by side in a medieval religious work. At that time, scientific thought was deeply influenced by flawed translations of ancient philosophical works. A thin line separated the alchemist from the philosopher and the scientific researcher. The practice of alchemy, for instance, was not forbidden until 1317, in Pope John XXII’s bull Spondent Pariter.

The Codex Gigas is unarguably the largest book of the Middle Ages, and in its time was even considered to be one of the wonders of the world. The curious image of the devil on one of its pages is responsible for fueling the legend about the book’s origins, and gave rise to its nickname (that is, “the Devil’s Bible”). But in truth, the image has only been included in the text because, right on the next page, the reader finds an illustration of the City of God: the author was simply showing the opposition of good and evil, heaven and hell.

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