Columbia subject headings:
Viterbo (Italy). Santa Maria della Quercia (Church)
Harvard subject headings:
Church architecture--Italy--Viterbo.
Convents--Italy--Viterbo.
Santa Maria della Quercia (Church : Viterbo, Italy)
Viterbo (Italy)--Buildings, structures, etc.
Princeton subject headings:
Viterbo. Santa Maria della Quercia (Church)