Columbia subject headings:
Belgium--History--1830-1914.
Belgium--History--20th century.
Belgium--Politics and government--1830-1914.
Belgium--Politics and government--1914-
Harvard subject headings:
Belgium--History.
Belgium--Kings and rulers--Biography.
Belgium--Politics and government.
European Union countries--Politics and government.
European Union--Belgium.
European Union--Great Britain.
European Union--Politics and government.
Monarchy--Belgium--History.
Royal houses--Belgium--History.
Saxe-Coburg-Gotha, House of.
Princeton subject headings:
Belgium--History--1830-1914.
Belgium--History--20th century.
Belgium--Politics and government--1830-1914.
Belgium--Politics and government--1914-