Columbia subject headings:
Abbeys--Italy--Umbria.
Benedictine architecture--Italy--Umbria.
Harvard subject headings:
Abbeys--Italy--Umbria.
Benedictine architecture--Italy--Umbria.
Benedictines--Italy--Umbria--History.
Umbria (Italy)--Buildings, structures, etc.
Umbria (Italy)--Church history.
Princeton subject headings:
Abbeys--Italy--Umbria.
Benedictine architecture--Italy--Umbria.
Benedictines--Italy--Umbria--History.
Umbria (Italy)--Buildings, structures, etc.
Umbria (Italy)--Church history.