Still crickets.
That's because it's a specious question, and has been answered in sundry ways, many times around here.
The answers don't lead back to Rome per se...which is part of why it's specious, for that is the manner in which the leading questions are desired to apply, is it not?
No crickets, just answers that have not been accepted yet. Here is a good explanation if you care to know it: The Formation of the Canon of the New Testament