Columbia subject headings:
Art--Private collections--Italy--Ariccia--Exhibitions.
Nobility--Europe--Portraits--Exhibitions.
Sayn-Wittgenstein-Sayn, Leonilla, Princess, 1816-1918--Art collections--Exhibitions.
Harvard subject headings:
Art, European--19th century--Exhibitions
Art--Italy--Ariccia--Exhibitions.
Palazzo Chigi (Ariccia, Italy)--Exhibitions.
Princeton subject headings:
Art, European--19th century--Exhibitions.
Art--Italy--Ariccia--Exhibitions.
Palazzo Chigi (Ariccia, Italy)--Exhibitions.