Really? Interesting. I know that the vast majority were Italian, with a few other nationalities mixed in. I recall there being a few from North Africa, but these were not Black Africans (i.e., sub Saharan)
They were from the Roman/Vandal kingdoms of North Africa, as black as South African Boers; liberal American Catholics pretend we had black popes to sell the faith to blacks, but I don’t believe we’ve had one yet.
I would like to have one, from one of the African countries where Muslims routinely persecute & kill Christians; they know the real deal, and will lead the Church in the cultural war the current hierarchy (excluding Benedict XVI and a few stalwarts) won’t fight.