Columbia subject headings:
Mosaics, Byzantine--Italy--Cefalù.
Mosaics, Byzantine--Italy--Monreale.
Mosaics, Byzantine--Italy--Palermo.
Harvard subject headings:
Christian art and symbolism--Italy--Sicily.
Church decoration and ornament--Italy--Sicily.
Mosaics, Byzantine--Italy--Sicily.
Mosaics, Norman--Italy--Sicily.
Princeton subject headings:
Church decoration and ornament--Italy--Sicily.
Mosaics, Norman--Italy--Sicily.