Columbia subject headings:
Architecture--Europe--History--19th century--Congresses.
Architecture--Italy--History--19th century--Congresses.
Capitals (Cities)--Europe--History--19th century--Congresses.
Capitals (Cities)--Italy--History--19th century--Congresses.
Eclecticism in architecture--Congresses.
Harvard subject headings:
Architecture--Europe--History--19th century--Congresses.
Cities and towns--Europe--History--19th century--Congresses.
City planning--Europe--History--19th century--Congresses.
Princeton subject headings:
Architecture--Europe--19th century--Congresses.
Architecture--Italy--19th century--Congresses.
Capitals (Cities)--Europe--History--19th century--Congresses.
Capitals (Cities)--Italy--History--19th century--Congresses.
Eclecticism in architecture--Congresses.