Columbia subject headings:
Harvard subject headings:
Catholic Church--Byzantine rite--Poland--History.
Catholic Church--Relations--Orthodox Eastern Church.
Orthodox Eastern Church--Relations--Catholic Church.
Poland--Church history--17th century.
Union of Brest
Zochovskyj, Cyprianus, approximately 1635-1693.
Princeton subject headings:
Catholic Church--Byzantine rite, Ukrainian--History.
Ukraine--Church history.
Union of Brest
Zochovskyj, Cyprianus, approximately 1635-1693.