Columbia subject headings:
Europe--History--1492-1648.
Europe--History--1648-1789.
Europe--History--476-1492.
Harvard subject headings:
Europe--History--1492-1648.
Europe--History--1648-1789.
Europe--History--476-1492.
Princeton subject headings:
Europe--History--1492-1648.
Europe--History--1648-1789.
Europe--History--476-1492.