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."
Lanxa kungaziwa ukuthi amaKhristu aqalisa nini ukuyisebenzisa, elinye ibhuku lithi: "Ekhulwini lesibili, phose wonke amaKhristu ayeyisebenzisa i-codex okokuthi ingabe yabakhona kungakabi ngumnyaka ka-A.D. 100."