Columbia subject headings:
Landscapes in art--Congresses.
Painting--Themes, motives--Congresses.
Spectators in art--Congresses.
Travel in art--Congresses.
Harvard subject headings:
Flaneurs in art--Congresses.
Landscape painting--Congresses.
Travel in art--Congresses.
Princeton subject headings:
Flaneurs in art--Congresses.
Landscape painting--Congresses.
Travel in art--Congresses.