Dr No[Moderator Omega - Wristscan]
36355
The Louvre is a museum with displays from several artists . . .
. . . genres, and eras.

The displays taken together are known as its collection.
An Arthur Sarnoff Gallery would display works created solely by Arthur Sarnoff.

The displays at the Sarnoff (if there is such a Gallery) would also be termed a collection.