Columbia subject headings:
Harvard subject headings:
Architecture--Italy--Gubbio--History.
Gubbio (Italy)--Buildings, structures, etc.
Historic buildings--Conservation and restoration--Italy--Gubbio.
Historic buildings--Italy--Gubbio.
Princeton subject headings:
Architecture--Italy--Gubbio--History.
Gubbio (Italy)--Buildings, structures, etc.
Historic buildings--Conservation and restoration--Italy--Gubbio.
Historic buildings--Italy--Gubbio.