Columbia subject headings:
Architecture, Domestic--Europe--History--21st century.
Skyscrapers--Europe--History--21st century.
Harvard subject headings:
Architecture, Domestic--Europe--History--21st century.
Skyscrapers--Europe--History--21st century.
Princeton subject headings:
Architecture, Domestic--Europe--History--21st century.
Skyscrapers--Europe--History--21st century.