Columbia subject headings:
Art, German--Germany--Darmstadt--20th century.
Artists--Germany--Darmstadt.
Olbrich, Joseph Maria, 1867-1908.
Harvard subject headings:
Architecture--Germany--Darmstadt--20th century.
Art, German--20th century--Darmstadt.
Olbrich, Joseph Maria, 1867-1908.
Princeton subject headings: