Columbia subject headings:
Ottawa (Ont.)--Buildings, structures, etc.
Parliament Buildings (Ottawa, Ont.)
Harvard subject headings:
Ottawa (Ont.)--Buildings, structures, etc.
Parliament Buildings (Ottawa, Ont.)
Public buildings--Ontario--Ottawa.
Princeton subject headings:
Architecture--Competitions--Canada.
Architecture--Ontario--Ottawa--Designs and plans.
Parliament Buildings (Ottawa, Ont.)
Public buildings--Ontario--Ottawa.