Columbia subject headings:
Architecture, Byzantine--Conservation and restoration--Italy--Ravenna.
Architecture, Early Christian--Conservation and restoration--Italy--Ravenna.
Art, Byzantine--Conservation and restoration--Italy--Ravenna.
Mosaics, Byzantine--Conservation and restoration--Italy--Ravenna.
Mosaics, Early Christian--Conservation and restoration--Italy--Ravenna.
Harvard subject headings:
Princeton subject headings:
Architecture, Byzantine--Conservation and restoration--Italy--Ravenna.
Architecture, Early Christian--Conservation and restoration--Italy--Ravenna.
Art, Byzantine--Conservation and restoration--Italy--Ravenna.
Mosaics, Byzantine--Conservation and restoration--Italy--Ravenna.
Mosaics, Early Christian--Conservation and restoration--Italy--Ravenna.