Columbia subject headings:
Castles--Italy--Foligno Region--Guidebooks.
Church buildings--Italy--Foligno Region--Guidebooks.
Foligno Region (Italy)--Guidebooks.
Harvard subject headings:
Castles--Italy--Foligno Region--Guidebooks.
Church buildings--Italy--Foligno Region--Guidebooks.
Foligno Region (Italy)--Guidebooks.
Princeton subject headings:
Castles--Italy--Umbria--Guidebooks.
Church buildings--Italy--Umbria--Guidebooks.
Guidebooks.
Umbria (Italy)--Guidebooks.