Columbia subject headings:
Harvard subject headings:
Architecture, Byzantine--Italy--Classis (Extinct city)
Christian antiquities--Italy--Ravenna.
Christian art and symbolism--Italy--Ravenna.
Church architecture--Italy--Classis (Extinct city)
Church buildings--Italy--Ravenna.
Classe Fuori (Italy)--Churches.
Mosaics, Early Christian--Italy--Ravenna.
Mosaics--Italy--Ravenna
Ravenna (Italy)--Churches.
S. Apollinare nuovo (Basilica : Ravenna, Italy)
Princeton subject headings:
Architecture, Byzantine--Italy--Classis (Ancient city).
Architecture, Early Christian--Italy--Classis (Ancient city).
Church architecture--Italy--Classis (Ancient city).