Project Perpetual, a new philanthropy established to raise money for humanitarian causes by collaborating with artists, has enlisted Jeff Koons to create the first in a series of new works that will be used to raise money for the United Nations Foundation.

Mr. Koons, who is the subject of a retrospective at the Whitney Museum of American Art that runs through Oct. 19, and who recently created a “virtual sculpture” for Garage magazine, will create one large sculpture and three to five smaller pieces.