Columbia subject headings:
Albigenses.
Christian heresies--France--History--Middle Ages, 600-1500.
Church history--Middle Ages, 600-1500.
France--Church history--987-1515.
Inquisition--France--Languedoc-Roussillon.
Inquisition--France--Tarn-et-Garonne.
Harvard subject headings:
Albigenses--History
Christian heresies--History--Middle Ages, 600-1500
Crusades.
Heresy--History.
Inquisition.
Princeton subject headings:
Albigenses--History.
Crusades.
Heresy--History.
Inquisition.