Columbia subject headings:
Harvard subject headings:
Counter-Reformation--Europe.
Counter-Reformation.
Europe--History--17th century.
Europe--Religion--17th century.
Holy Roman Empire--History--1517-1648.
Military art and science--Europe--History--17th century
Thirty Years' War, 1618-1648--Religious aspects
Princeton subject headings:
Germany, Southern--Religion--17th century.
Germany--History--1618-1648.
Thirty Years' War, 1618-1648--Religious aspects.