Columbia subject headings:
Christianity and politics--History.
Church and state--History.
Lutheran Church--Doctrines--History.
Two kingdoms (Lutheran theology)
Harvard subject headings:
Christianity and politics--History--20th century--Congresses.
Church and state--History--20th century--Congresses.
Lutheran Church--Doctrines--History--20th century--Congresses.
Two kingdoms (Lutheran theology)--Congresses.
Princeton subject headings: