The New Testament is a collection of biblical books written by various authors between 45 AD and 100 AD, revolving around the life and work of Jesus of Nazareth and His apostles, as well as the history of the early church. The books are traditionally classified into categories: As with the Old Testament, the chapter and verse divisions of the various books are not original, but were added in medieval times for greater understanding. The oldest books in the New Testament are the letters of Paul, or possibly the book of James.