Columbia subject headings:
Harvard subject headings:
City halls--Europe--Design and construction--Congresses.
City halls--Europe--History--Congresses.
City halls--Social aspects--Europe--Congresses.
Civic centers--Europe--History--Congresses.
Public buildings--Europe--History--Congresses.
Princeton subject headings:
City halls--Europe--History--Congresses.
Public architecture--Europe--History--Congresses.