Artifact · Authenticated · National Library of Sweden, Stockholm
Codex Gigas (Devil's Bible)
The Codex Gigas has 309 parchment leaves and a full-page Devil. By 1635 people said the Devil helped write it.
The legend says the Devil helped a walled-up monk. Why would a story like that attach itself to a book?
Photo: Benedictine monastery of Podlažice, Public domain, Wikimedia Commons