08/04/2012 at 11:50 AM
Kodeks IV NagHammadi100s CE, Rome: The codex format is used for the first time. A codex is the very earliest form of book that we had that looks like a book. Before the invention of the codex, all knowledge was written in scrolls or on tablets, or the walls of monuments. This was the first time we could leaf through information in such a convenient manner.