Columbia subject headings:
Art--Italy--Ravenna.
Ravenna (Italy)
Ravenna (Italy)--Civilization.
Harvard subject headings:
Architecture--Italy--Ravenna.
Art--Italy--Ravenna
Christian art and symbolism--Italy--Ravenna--Medieval, 500-1500.
Mosaics--Italy--Ravenna
Ravenna (Italy)--Antiquities.
Ravenna (Italy)--Buildings, structures, etc.
Ravenna (Italy)--Civilization.
Princeton subject headings:
Archaeology, Medieval--Italy--Ravenna.
Architecture--Italy--Ravenna.
Art--Italy--Ravenna.
Christian art and symbolism--Italy--Ravenna.
Ravenna (Italy)--Antiquities.
Ravenna (Italy)--Buildings, structures, etc.