Columbia subject headings:
Brittany (France)--Antiquities.
Excavations (Archaeology)--France--Brittany.
Fortification--France--Brittany--History--Middle Ages, 600-1500.
Harvard subject headings:
Brittany (France)--Antiquities.
Excavations (Archaeology)--France--Brittany.
Fortification--France--Brittany.
Princeton subject headings:
Brittany (France)--Antiquities.
Excavations (Archaeology)--France--Brittany.
Fortification--France--Brittany--History--Middle Ages, 600-1500.