Columbia subject headings:
Architecture, Early Christian--Italy--Rome.
Architecture, Roman--Italy--Rome.
Building materials--Recycling--Italy--Rome.
Buildings--Remodeling for other use--Italy--Rome.
Harvard subject headings:
Architecture--Details--Italy--Rome--History.
Building materials--Recycling--Italy--Rome--History.
Classical antiquities--History.
Decoration and ornament, Architectural--Italy--Rome--History.
Princeton subject headings:
Architecture, Early Christian--Italy--Rome.
Architecture, Roman--Italy--Rome.
Building materials--Recycling--Italy--Rome.
Buildings--Remodeling for other use--Italy--Rome.