Columbia subject headings:
Enamel and enameling, Medieval--Italy--Siena.
Goldsmiths--Italy--Siena.
Goldwork, Medieval--Italy--Siena.
Harvard subject headings:
Enamel and enameling, Medieval--Italy--Siena.
Goldsmiths--Italy--Siena--History.
Goldwork, Medieval--Italy--Siena.
Princeton subject headings:
Art metal-work--Italy--Siena--History.
Goldwork--Italy--Siena--History.
Silverwork--Italy--Siena--History.