Columbia subject headings:
Mosaics, Byzantine--Italy--Ravenna.
Mosaics, Early Christian--Italy--Ravenna.
Mosaics--Italy--Ravenna.
Harvard subject headings:
Christian art and symbolism--Italy--Ravenna--Medieval, 500-1500.
Mosaics, Byzantine--Italy--Ravenna.
Mosaics, Early Christian--Italy--Ravenna.
Princeton subject headings:
Mosaics, Byzantine--Italy--Ravenna.
Mosaics, Early Christian--Italy--Ravenna.
Mosaics--Italy--Ravenna.