Columbia subject headings:
Capitalists and financiers--Belgium--History--18th century.
Capitalists and financiers--Belgium--History--19th century.
Elite (Social sciences)--Belgium--History--18th century.
Elite (Social sciences)--Belgium--History--19th century.
Rich people--Belgium--History--18th century.
Rich people--Belgium--History--19th century.
Harvard subject headings:
Belgium--Social life and customs.
Rich people--Belgium.
Upper class--Belgium.
Wealth--Belgium.
Princeton subject headings: