Codex Gigas is a manuscript written in latin way back 1210 AD. This is made of over 160 animal skins, almost a meter long and it takes 2 people just to lift it. This also has a 320 pages of which 7 pages have been removed without a trace. Codex Gigas is also known as Devils Bible because it describes and illustrates mostly of a fallen angel who is Satan. Codex Gigas was possibly written by a monk name Herman the Recluse according to the experts.

The Codex Gigas contains the entire Vulgate version of the bible, Isidore of seville's encyclopedia Etymologiae, Josephus' Antiquities of the Jews, Cosmas of Prague's Chronicle of Bohemia, chapters of history, etymology and physiology, a calendar with necrologium, a list of brothers from the Podlažice monastery and details of magic formulas, spells, medicine and other records.