Columbia subject headings:
Architecture, Classical--Influence--Congresses.
Architecture--Baltic Sea Region--Congresses.
Architecture--Baltic States--Congresses.
Harvard subject headings:
Architecture, Classical--Influence--Congresses.
Architecture--Baltic Sea Region--Congresses.
Architecture--Baltic States--Congresses.
Princeton subject headings:
Architecture, Classical--Influence--Congresses.
Architecture--Baltic Sea Region--Congresses.
Architecture--Baltic States--Congresses.