That's good to know, I hadn't realised. Religion aside, my point still stands.
Bitslice does have a valid point, even if overplayed somewhat. There was a significant period where the fall of the Roman Civilisation led to an interregnum where much of the technology and learning of Rome was forgotten or simply ignored as Roman influence withdrew back into Rome itself and other less advanced peoples filled the void. We now know that it was not as widespread or complete as once thought (we no longer refer to The Dark Ages for example), but there was significant regression nonetheless...offset in large part by The Christian Church and its efforts to preserve Knowledge and Language.