Columbia subject headings:
Harvard subject headings:
Catholic Church--Relations--Orthodox Eastern Church--History.
Orthodox Eastern Church--Italy, Southern--History--18th century.
Orthodox Eastern Church--Italy, Southern--History--19th century.
Orthodox Eastern Church--Relations--Catholic Church--History.
Princeton subject headings:
Catholic Church--Relations--Orthodox Eastern Church--History.
Orthodox Eastern Church--Italy, Southern--History--18th century.
Orthodox Eastern Church--Italy, Southern--History--19th century.
Orthodox Eastern Church--Relations--Catholic Church--History.