Columbia subject headings:
Catholic Church--Turkey--Istanbul--History.
Catholics--Turkey--Istanbul--History.
Europeans--Turkey--Istanbul--History.
Harvard subject headings:
Catholic Church--Turkey--Istanbul--History.
Catholics--Turkey--Istanbul--History.
Europeans--Turkey--Istanbul--History.
Italians--Turkey--Istanbul--History.
Princeton subject headings:
Christians--Turkey--Istanbul--History.
Italians--Turkey--Istanbul--History.