Columbia subject headings:
Chigi family.
Gardens--Italy--Rome--History.
Gardens--Italy--Siena--History.
Harvard subject headings:
Chigi family.
Chigi, Agostino, 1466-1520--Homes and haunts.
Gardens--Italy--Rome--History.
Gardens--Italy--Siena--History.
Princeton subject headings:
Chigi family.
Gardens--Italy--Rome--History.
Gardens--Italy--Siena--History.