The Fifth Ecumenical Council (533 AD) does say that Mary was ever-virgin, i.e. perpetually virgin.
-A8
"The Fifth Ecumenical Council (533 AD) does say that Mary was ever-virgin, i.e. perpetually virgin."
App. 540 years after His birth they come to that conclusion based on what, "oral tradition"? I think it is safer to take the witness of the writers of the New Testament at face value. At least then you can blame any error on the inspired writers rather than uninspired men hundreds of years after who were relying on unsubstantiated tradition.