Columbia subject headings:
Europe, Eastern--Description and travel--Congresses.
Europe, Eastern--In art--Congresses.
Harvard subject headings:
Europe, Eastern, in art--Congresses.
Europe, Eastern--Description and travel--Congresses.
Europe, Eastern--In art--Congresses.
Princeton subject headings:
Europe, Eastern--Description and travel--Congresses.
Europe, Eastern--In art--Congresses.