Columbia subject headings:
Architecture, Medieval--Conservation and restoration--Italy--Spoleto.
Rocca (Spoleto, Italy)
Spoleto (Italy)--Buildings, structures, etc.
Harvard subject headings:
Architecture, Medieval--Conservation and restoration--Italy--Spoleto.
Rocca (Spoleto, Italy)
Spoleto (Italy)--Buildings, structures, etc.
Princeton subject headings:
Castles--Italy--Spoleto.
Correctional institutions--Italy--Spoleto.
Rocca di Spoleto (Italy)