Columbia subject headings:
Harvard subject headings:
Nobility--Italy--Viterbo--Biography.
Sacchi family--Archives.
Sacchi family.
Viterbo (Italy)--Biography.
Viterbo (Italy)--History--Sources.
Viterbo (Italy)--History.
Princeton subject headings:
Catholic Church--Italy--Viterbo--History--Sources.
Sacchi family.
Viterbo (Italy)--History--Sources.