Columbia subject headings:
Harvard subject headings:
Architecture, Modern--19th century--Belgium--Brussels.
Art nouveau--Belgium--Brussels.
Brussels (Belgium)--Buildings, structures, etc.
Horta, Victor, baron, 1861-1947
Princeton subject headings:
Art nouveau (Architecture)--Belgium--Brussels.
Brussels (Belgium)--Buildings, structures, etc.
Horta, Victor, baron, 1861-1947--Criticism and interpretation.