
The Codex Gigas, also known as the “Devil’s Bible,” is one of the most mysterious medieval manuscripts ever discovered. Created in the 13th century in Bohemia (modern-day Czech Republic), this massive book is famous for its gigantic size, unusual contents, and eerie legend that suggests it was written with the help of the Devil himself.
1️⃣ The Largest Medieval Manuscript
The Codex Gigas holds the title of the biggest surviving medieval manuscript ever written. With dimensions of 92 cm (36 inches) in height and a weight of around 75 kg (165 lbs), it is an extraordinary work of medieval craftsmanship. The book is so large that it would have required a single calf’s skin for each page, which is why scholars believe it was an expensive and time-consuming project. It originally contained 320 pages, though some are mysteriously missing.
2️⃣ A Single Author’s Masterpiece
Unlike most medieval manuscripts, which were created by teams of scribes, the Codex Gigas appears to be the work of just one person. The handwriting remains consistent throughout the book, which suggests the author might have spent decades writing it. If this is true, it would be one of the greatest solo efforts in the history of book-making. Despite its enormous size, the text is beautifully arranged and carefully written, reflecting the skill and dedication of its unknown creator.
3️⃣ A Mysterious Devil’s Portrait
One of the most striking and eerie features of Codex Gigas is a full-page illustration of the Devil. The image is unusual, as it depicts Satan with red claws, green eyes, and an unsettling expression. Surrounding him is a dark void, making it one of the most unsettling illustrations in any religious manuscript. This depiction is believed to be symbolic of the book’s connection to the Devil and has fueled myths that the manuscript was created through a demonic pact.


4️⃣ A Collection of Religious & Occult Texts
Codex Gigas is more than just a Bible—it is a compilation of various texts, including medical guides, historical records, magic spells, and exorcism rituals. While it contains a complete Latin Bible, it also features information about diseases, herbal medicine, and supernatural beliefs from medieval times. The presence of both holy and occult texts in the same book makes it one of the most mysterious and debated historical documents.
5️⃣ The Legend of Its Creation
According to an old legend, a monk was sentenced to death for breaking monastery rules. To escape punishment, he promised to write a book containing all human knowledge in one night. As midnight approached, he realized it was impossible, so he made a pact with the Devil. The Devil completed the book for him, and in return, the monk included a full-page portrait of Satan as a tribute. While historians dismiss this as a myth, the sheer size, mysterious missing pages, and eerie contents of Codex Gigas continue to spark speculation.

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