Columbia subject headings:
Church decoration and ornament--Italy--Ravenna.
Mosaics, Early Christian--Italy--Ravenna.
Harvard subject headings:
Mosaics, Byzantine--Croatia--Poreč (Poreč)--Catalogs.
Mosaics, Byzantine--Italy--Ravenna--Catalogs.
Mosaics--Croatia--Poreč (Poreč)--Catalogs.
Mosaics--Italy--Ravenna--Catalogs.
Princeton subject headings:
Mosaics, Byzantine--Croatia--Poreč (Poreč).
Mosaics, Byzantine--Italy--Ravenna.
Mosaics--Croatia--Poreč (Poreč).
Mosaics--Italy--Ravenna.