Thanks so much, Robert!
My 'Austrian/Slovakian' family was Roman Catholic, and they actually lived in Braddock Ward, Allegheny, PA. Chances are they went to that Braddock Catholic Church; i'm going to have to plan a trip up there to personally check out some records! :)
I know precious little about Western European history, so between you and ZlaticaBeca I am trying to piece it together in my head! :) ha