Columbia subject headings:
Arnaldo, da Brescia, -1155.
Church history--Middle Ages, 600-1500.
Popes--Temporal power.
Harvard subject headings:
Arnaldo da Brescia, -1155.
Church history--Middle Ages, 600-1500
Popes--Temporal power
Princeton subject headings:
Arnaldo, da Brescia, -1155.
Church history--Middle Ages.
Popes--Temporal power.