Columbia subject headings:
Albigenses.
Castles--France--Corbières Mountains--History.
Château de Quéribus (France)
Corbières Mountains (France)--History.
Fortification--France--Corbières Mountains--History.
Harvard subject headings:
Albigenses.
Castles--France--Corbières Mountains--History.
Château de Quéribus (France)
Corbières Mountains (France)--History.
Fortification--France--Corbières Mountains--History.
Princeton subject headings:
Albigensis.
France--History--Louis IX, 1226-1270.
Quéribus (Castle : Pyrénées-Orientales, France)--History.