Columbia subject headings:
Church and state--Holy Roman Empire.
Ecclesiastical law--Holy Roman Empire.
Freedom of religion--Holy Roman Empire.
Harvard subject headings:
Church and state--Holy Roman Empire
Ecclesiastical law--Holy Roman Empire.
Ferdinand II, Holy Roman Emperor, 1578-1637
Freedom of religion--Holy Roman Empire.
Princeton subject headings:
Church and state--Holy Roman Empire.
Ecclesiastical law--Holy Roman Empire.
Freedom of religion--Holy Roman Empire.