Columbia subject headings:
Harvard subject headings:
Cities and towns--Europe--History--Early works to 1800--Congresses.
City planning--Europe--History--Early works to 1800--Congresses.
Europe--Capital and capitol--History--Congresses.
Middle class--Europe--History--Early works to 1800--Congresses.
Princeton subject headings:
Cities and towns--Europe--History--Early works to 1800--Congresses.
City planning--Europe--History--Early works to 1800--Congresses.
Europe--Capital and capitol--History--Congresses.
Middle class--Europe--History--Early works to 1800--Congresses.