Columbia subject headings:
Christian heresies--History--Middle Ages, 600-1500.
Christian heretics.
Church history--Middle Ages, 600-1500.
Harvard subject headings:
Christian heresies--History--Middle Ages, 600-1500
Christian heresies--Italy, Northern--History.
Christian heretics--Italy, Northern--History.
Dissenters, Religious--Italy, Northern--History.
Persecution--History--Middle Ages, 600-1500
Persecution--Italy, Northern--History.
Princeton subject headings:
Christian heresies--History--Middle Ages, 600-1500.
Christian heresies--Italy, Northern--History.
Christian heretics--Italy, Northern--History.
Dissenters, Religious--Italy, Northern--History.
Persecution--History--Middle Ages, 600-1500.
Persecution--Italy, Northern--History.