Columbia subject headings:
Architecture, Modern--20th century.
Architecture--France--Picardy.
Picardy (France)--Buildings, structures, etc.
Harvard subject headings:
Architecture--France--Picardy--20th century.
Architecture--France--Picardy--21st century.
Princeton subject headings:
Architecture, Modern--20th century.
Architecture--France--Picardy.
Picardy (France)--Buildings, structures, etc.