Columbia subject headings:
City planning--France--History--19th century.
Fortification--France--History--19th century.
France--History, Military--19th century.
Harvard subject headings:
City planning--France--History--19th century.
Fortification--France--History--19th century.
France--History, Military--19th century.
Princeton subject headings:
City planning--France--History--19th century.
Fortification--France--History--19th century.
France--History, Military--19th century.