Columbia subject headings:
Ireland--History--1172-1603.
Ireland--History--17th century.
Harvard subject headings:
Ireland--History--1172-
Ireland--History--1172---Early works to 1800.
Ireland--History--17th century--Early works to 1800.
Ireland--History--17th century.
Princeton subject headings:
Ireland--History--1172-1603.
Ireland--History--17th century.