Early Church Fathers on Mary’s Perpetual Virginity - http://www.catholic.com/tracts/mary-ever-virgin
Pope Siricius I
“You had good reason to be horrified at the thought that another birth might issue from the same virginal womb from which Christ was born according to the flesh. For the Lord Jesus would never have chosen to be born of a virgin if he had ever judged that she would be so incontinent as to contaminate with the seed of human intercourse the birthplace of the Lord’s body, that court of the eternal king” (Letter to Bishop Anysius [A.D. 392]).
(see more church fathers at above link)
You can also check out:
Salza for more Church Fathers - http://www.scripturecatholic.com/blessed_virgin_mary.html#tradition-III
Hahn’s site for more - http://www.salvationhistory.com/search/results/81ef5793412e6baa02ab6980d5ddd051/
Hopefully that will keep you busy. :)
God Bless
I’ve read all that, thank you very much for the links, but that is not what I was looking for.
I know the history of the doctrine probably better than most Catholics (Historian), what I am looking for is why it matters to Modern (not Medieval) Catholics.
Is it a theological hill to die on? If so, why?