Picture from Codex Gigas. I assume it can be licensed as PD because it is a part of manuscript from the 13th century. The source of the picture is web of The Royal Library, National Library of Sweden (http://www.kb.se) and according to the license (http://www.kb.se/ENG/Copyright.htm) it can be reproduced if the Royal Library is stated as the source.
The copyright holder of this file allows anyone to use it for any purpose, provided that the copyright holder is properly attributed. Redistribution, derivative work, commercial use, and all other use is permitted.