Columbia subject headings:
Catholic Church--Europe, Eastern.
Church and state--Europe, Eastern.
Freedom of religion--Europe, Eastern.
Harvard subject headings:
Catholic Church
Church and state--Catholic Church--History
Church and state--Europe, Eastern--History.
Religion and state--Russia (Federation)--History.
Princeton subject headings:
Church and state--Catholic Church--History.
Church and state--Europe, Eastern--History.
Religion and state--Russia (Federation)--History.