Columbia subject headings:
Architecture, Early Christian.
Baptism--History--Early church, ca. 30-600.
Baptisteries--Italy.
Harvard subject headings:
Architecture, Early Christian.
Baptism--History--Early church, ca. 30-600
Baptisteries--Italy.
Princeton subject headings:
Architecture, Early Christian--Italy.
Baptism--History--Early church, ca. 30-600.
Baptisteries--Italy.