Columbia subject headings:
Christian art and symbolism--Italy--Sovana.
Duomo di Sovana.
Sovana (Italy)--Buildings, structures, etc.
Harvard subject headings:
Architecture, Romanesque--Italy--Sovana.
Church architecture--Italy--Sovana.
Duomo di Sovana.
Sovana (Italy)--Buildings, structures, etc.
Symbolism in architecture--Italy--Sovana.
Princeton subject headings:
Archaeoastronomy--Italy--Sovana.
Cathedrals--Italy--Sovana.
Church decoration and ornament--Italy--Sovana.
Duomo di Sovana--History.