Columbia subject headings:
Harvard subject headings:
Gerontocracy--Rome--History.
Gerontocracy--Turkey--History--To 1500.
Greece--Antiquities.
Older people--Rome--Societies, etc.
Older people--Turkey--Societies, etc.--History--To 1500.
Turkey--Antiquities, Roman.
Princeton subject headings:
Turkey--Civilization.
Turkey--History--To 1453.