Columbia subject headings:
Luther, Martin, 1483-1546--Political and social views--Congresses.
Harvard subject headings:
Luther, Martin, 1483-1546--Political and social views--Congresses.
Princeton subject headings:
Church and state--History of doctrines--16th century--Congresses.
Luther, Martin, 1483-1546--Political science--Congresses.
Two kingdoms (Lutheran theology)--Congresses.