Columbia subject headings:
Arnolfo, di Cambio, active 13th century.
Giotto, 1266?-1337.
Harvard subject headings:
Arnolfo, di Cambio, active 13th century.
Giotto, 1266?-1337.
Princeton subject headings:
Arnolfo, di Cambio, active 13th century.
Giotto, 1266?-1337.