Columbia subject headings:
Chiesa di San Sisto (Viterbo, Italy)
Church decoration and ornament--Italy--Viterbo--Guidebooks.
Viterbo (Italy)--Buildings, structures, etc.
Viterbo (Italy)--Church history.
Harvard subject headings:
Chiesa di San Sisto (Viterbo, Italy)
Church decoration and ornament--Italy--Viterbo.
Viterbo (Italy)--Buildings, structures, etc.
Viterbo (Italy)--Church history.
Princeton subject headings:
Chiesa di San Sisto (Viterbo, Italy)
Church decoration and ornament--Italy--Viterbo--Guidebooks.
Viterbo (Italy)--Buildings, structures, etc.
Viterbo (Italy)--Church history.