Columbia subject headings:
Church architecture--Italy--Umbria.
Decoration and ornament, Architectural--Italy--Umbria.
Rose windows--Italy--Umbria.
Harvard subject headings:
Church decoration and ornament--Italy--Umbria.
Decoration and ornament, Architectural--Italy--Umbria.
Rose windows--Italy--Umbria.
Princeton subject headings:
Church architecture--Italy--Umbria.
Decoration and ornament, Architectural--Italy--Umbria.
Rose windows--Italy--Umbria.