Another major source of asset wealth was his art collection, ranging from impressionist to postmodern, which he developed through the influence upon him of his mother Abby and her establishment, with two associates, of the Museum of Modern Art in New York City in 1929. The collection, valued at several hundred million dollars, is scheduled for auction in Spring 2018, with proceeds to go to several designated nonprofit organizations, including Rockefeller University, Harvard University, the Museum of Modern Art, the Council on Foreign Relations, and the Maine Coast Heritage Trust.