what does the bible say?
The word codex means these manuscripts were handwritten in codex or book form rather than on a scroll. They are considered excellent manuscript witnesses for reconstructing the original biblical text.
The name Codex Sinaiticus is based on the location of its discovery in 1859 at the Monastery of Saint Catherine on Mount Sinai. It consists of more than four hundred pages that include much of the Old Testament in Greek along with the complete New Testament. Scholars estimate its date to the middle of the fourth century.
Codex Vaticanus is based on its location in the Vatican Library. It is a much larger manuscript of 759 pages and includes nearly the entire Old and New Testaments. It has been known to have remained in the Vatican Library since at least 1475. It was written sometime in the fourth century.