And I could just as easily say that it's typical to focus on later sources and ignore the fact that there are earlier ones :) The Codex is just everything gathered together: the items gathered were much older.

Do you know that in late medieval Germany there were several official heads of John the Baptist in reliquaries at different places? How on Earth such things can justify anything? Older lies are still lies, right? The only good thing is calligraphy and writing school that emerged within the Church, that started to serve science later.