Columbia subject headings:
Harvard subject headings:
Art--Italy--Formello--Exhibitions.
Chigi family--Art patronage--Exhibitions.
Chigi family--Homes and haunts--Italy--Formello--Exhibitions.
Formello (Italy)--History--Exhibitions.
Princeton subject headings:
Art--Italy--Formello--Exhibitions.
Chigi family--Exhibitions.
Formello (Italy)--History--Exhibitions.