Columbia subject headings:
Building stones--Italy--Florence.
Decoration and ornament, Architectural--Italy--Florence.
Pavements, Stone--Italy--Florence.
Harvard subject headings:
Building stones--Italy--Florence.
Decoration and ornament, Architectural--Italy--Florence.
Historic districts--Italy--Florence--History.
Pavements, Stone--Italy--Florence.
Pavements--Italy--Florence.
Princeton subject headings: