The bible you;re thinking of, the Gutenberg Bible, was I believe written in Latin. http://en.wikipedia.org/wiki/Gutenberg_Bible Doesn;t say. The church back then used Latin for mass so it would make sense for the bible to also be in Latin. http://en.wikipedia.org/wiki/File:Gutenberg_bible_Old_Testament_Epistle_of_St_Jerome.jpg Looks like Latin to me. edit: Further down on that second page mentions that the Gutenberg Bible was written in Latin.