The title is from a New York Times  article
by Roberta Smith on the Barnes collection
(see previous post):

“Nearly every room is an exhibition
unto itself— a kind of art wunderkammer,
or cabinet of curiosities….”

Another sort of Wunderkammer:

Shown above is a Google image search today for Göpel tetrads .
The selected detail is an Oct. 7, 2011, image search
for claves regni caelorum escher  (2 MB).