Columbia subject headings:
Church and state--Europe, Central--History.
Church and state--Europe, Eastern--History.
Church history--Middle Ages, 600-1500.
Church history--Modern period, 1500-
National security--Europe, Central--History.
National security--Europe, Eastern--History.
Harvard subject headings:
Catholic Church--Europe, Eastern--Apologetic works--History and criticism.
Catholic Church--Europe, Eastern--History--16th century.
Catholic Church--Europe, Eastern--History--17th century.
Catholic Church--Europe, Eastern--History--To 1500.
Christianity and other religions--Europe, Eastern--16th century.
Christianity and other religions--Europe, Eastern--17th century.
Christianity and other religions--Europe, Eastern--Islam--History--16th century.
Christianity and other religions--Europe, Eastern--Islam--History--17th century.
Christianity and other religions--Europe, Eastern--Islam--History--To 1500.
Christianity and other religions--Europe, Eastern--To 1500.
Europe, Eastern--Church history--Middle Ages, 600-1500.
Religious thought--Europe, Eastern--Middle Ages, 600-1500.
Princeton subject headings:
Catholic Church--Europe, Eastern--Apologetic works--History and criticism.
Catholic Church--Europe, Eastern--History--16th century.
Catholic Church--Europe, Eastern--History--17th century.
Catholic Church--Europe, Eastern--History--To 1500.
Christianity and other religions--Europe, Eastern--16th century.
Christianity and other religions--Europe, Eastern--17th century.
Christianity and other religions--Europe, Eastern--Islam--History--16th century.
Christianity and other religions--Europe, Eastern--Islam--History--17th century.
Christianity and other religions--Europe, Eastern--Islam--History--To 1500.
Christianity and other religions--Europe, Eastern--To 1500.
Church history--Europe, Eastern--Middle Ages, 600-1500.
Religious thought--Europe, Eastern--Middle Ages, 600-1500.