Columbia subject headings:
Brussels (Belgium)--History--18th century--Congresses.
Public spaces--Belgium--Brussels--History--18th century--Congresses.
Harvard subject headings:
Brussels (Belgium)--History--18th century--Congresses.
Public spaces--Belgium--Brussels--History--18th century--Congresses.
Princeton subject headings:
Brussels (Belgium)--History--18th century--Congresses.
Public spaces--Belgium--Brussels--History--18th century--Congresses.