Columbia subject headings:
Complesso di San Nicolò (Ravenna, Italy)--Catalogs.
Mosaics, Italian--Catalogs.
Mosaics, Medieval--Italy--Catalogs.
Harvard subject headings:
Mosaics, Byzantine--Italy.
Mosaics, Medieval--Italy.
Mosaics, Roman--Italy.
Mosaics--Italy
Princeton subject headings:
Mosaics, Byzantine--Italy.
Mosaics, Medieval--Italy.
Mosaics, Roman--Italy.
Mosaics--Italy.