Columbia subject headings:
Art nouveau (Architecture)--Belgium.
Horta, Victor, baron, 1861-1947--Exhibitions.
Harvard subject headings:
Architecture, Modern--19th century--Belgium.
Architecture, Modern--20th century--Belgium.
Art nouveau (Architecture)--Belgium.
Horta, Victor, baron, 1861-1947--Exhibitions.
Princeton subject headings:
Art nouveau (Architecture)--Belgium.
Horta, Victor, baron, 1861-1947--Exhibitions.