Columbia subject headings:
Catholic Church--Foreign relations--France.
Catholic Church--Foreign relations--Great Britain.
France--Foreign relations--Catholic Church.
Great Britain--Foreign relations--Catholic Church.
Papal States--History--1815-1870.
Roman question.
Harvard subject headings:
Catholic Church--Foreign relations--France.
Catholic Church--Foreign relations--Great Britain.
France--Foreign relations--Catholic Church.
Great Britain--Foreign relations--Catholic Church.
Papal States--History--1815-1870.
Roman question.
Princeton subject headings:
Catholic Church--Foreign relations--France.
Catholic Church--Foreign relations--Great Britain.
France--Foreign relations--Catholic Church.
Great Britain--Foreign relations--Catholic Church.
Papal States--History--1815-1870.
Roman question.