Columbia subject headings:
Architecture--Austria--Vienna--History--21st century.
Congregate housing--Austria--Vienna--Designs and plans.
Nursing homes--Austria--Vienna--Designs and plans.
Vienna (Austria)--Buildings, structures, etc.
Harvard subject headings:
Architecture--Austria--Vienna--21st century.
Housing, Co-operative--Austria.
Nursing homes--Austria.
Older people--Housing--Austria.
Princeton subject headings:
Architecture--Austria--Vienna--21st century.
Congregate housing--Austria--Vienna--Designs and plans.
Nursing homes--Austria--Vienna--Designs and plans.
Vienna (Austria)--Buildings, structures, etc.