Columbia subject headings:
Harvard subject headings:
Mosaics, Italian--Italy--Ravenna.
Mosaics, Medieval--Italy--Ravenna.
Mosaics--Conservation and restoration--Italy--Ravenna.
S. Apollinare nuovo (Basilica : Ravenna, Italy)
Princeton subject headings:
Mosaics, Italian--Italy--Ravenna.
Mosaics, Medieval--Italy--Ravenna.
Mosaics--Conservation and restoration--Italy--Ravenna.
S. Apollinare nuovo (Basilica : Ravenna, Italy)