Columbia subject headings:
Architecture--Latvia--History--19th century.
Architecture--Latvia--History--20th century.
Architecture--Russia (Federation)--Saint Petersburg--History--19th century.
Architecture--Russia (Federation)--Saint Petersburg--History--20th century.
Architecture--Scandinavia--History--19th century.
Architecture--Scandinavia--History--20th century.
Harvard subject headings:
Princeton subject headings:
Architecture--Europe, Northern--19th century.
Architecture--Europe, Northern--20th century.
National romanticism (Architecture)--Europe, Northern.