Columbia subject headings:
Mosaics, Byzantine--Italy--Ravenna.
Mosaics--Italy--Ravenna.
Harvard subject headings:
Church architecture--Italy--Ravenna.
Church decoration and ornament--Italy--Ravenna.
Mosaics, Byzantine--Italy--Ravenna.
Mosaics, Early Christian--Italy--Ravenna.
Ravenna (Italy)--Buildings, structures, etc.
Princeton subject headings:
Church architecture--Italy--Ravenna.
Church decoration and ornament--Italy--Ravenna.
Mosaics, Byzantine--Italy--Ravenna.
Mosaics, Early Christian--Italy--Ravenna.
Ravenna (Italy)--Buildings, structures, etc.