Columbia subject headings:
Christian heresies--Italy--Lombardy--History.
Church history--13th century.
Inquisition--Italy--Lombardy--History.
Lombardy (Italy)--Church history.
Harvard subject headings:
Christian heresies--Italy--Lombardy--History.
Church history--13th century
Inquisition--Italy--Lombardy--History.
Lombardy (Italy)--Church history.
Princeton subject headings: