The Gutenberg Bible was the first substantial book printed from movable type on a printing press and the Harry Ransom Center at the University of Texas at Austin has one of five complete copies in the United States. They’ve generously scanned many of the pages and put them online, as well as some background information about the bible and Gutenberg. Below is one of the pages and the online exhibition starts here.
The Gutenberg Bible, Volume 1, Old Testament, Exodus, Leviticus