Columbia subject headings:
Church architecture--Conservation and restoration--Italy--Viterbo.
Franciscan architecture--Italy--Viterbo.
Popes--Tombs--Italy--Viterbo.
San Francesco alla Rocca (Church : Viterbo, Italy)--History.
Viterbo (Italy)--Buildings, structures, etc.
Harvard subject headings:
Church architecture--Conservation and restoration--Italy--Viterbo.
Franciscan architecture--Italy--Viterbo.
Popes--Tombs--Italy--Viterbo.
San Francesco alla Rocca (Church : Viterbo, Italy)--History.
Viterbo (Italy)--Buildings, structures, etc.
Princeton subject headings:
Church architecture--Conservation and restoration--Italy--Viterbo.
Franciscan architecture--Italy--Viterbo.
Popes--Tombs--Italy--Viterbo.
San Francesco alla Rocca (Church : Viterbo, Italy)--History.
Viterbo (Italy)--Buildings, structures, etc.