Columbia subject headings:
Art--Italy--Florence--Congresses.
Baptisteries--Italy--Florence--Congresses.
Battistero di San Giovanni (Florence, Italy)--Congresses.
Christian art and symbolism--Italy--Florence--Congresses.
Florence (Italy)--Buildings, structures, etc.--Congresses.
Harvard subject headings:
Battistero di San Giovanni (Florence, Italy)--Congresses.
Christian art and symbolism--Italy--Florence--Congresses.
Church decoration and ornament--Italy--Florence--Congresses.
Florence (Italy)--Buildings, structures, etc.--Congresses.
Princeton subject headings:
Art--Italy--Florence--Congresses.
Baptisteries--Italy--Florence--Congresses.
Battistero di San Giovanni (Florence, Italy)--Congresses.
Christian art and symbolism--Italy--Florence--Congresses.
Florence (Italy)--Buildings, structures, etc.--Congresses.