Though it is not known exactly when Christians began to use the codex, one reference work states: “So universal is the Christian use of the codex in the second century that its introduction must date well before A.D. 100. ”
यह थी इतिहास की सबसे पहली किताब, जिसमें पन्‍नों को जोड़कर किताब तैयार की जाती थी ।