Columbia subject headings:
Arnolfo, di Cambio, active 13th century.
Art, Italian--Italy--Tuscany--13th century.
Tuscany (Italy)--History.
Harvard subject headings:
Architecture--Italy--Tuscany
Arnolfo, di Cambio, active 13th century.
Art, Italian--Italy--Tuscany
Tuscany (Italy)--Historical geography.
Tuscany (Italy)--History--To 1434.
Princeton subject headings:
Arnolfo, di Cambio, active 13th century.
Art, Italian--Italy--Tuscany--13th century.
Tuscany (Italy)--History.