Most of the money comes from countries in Europe, the Middle East and elsewhere in Asia, particularly the oil-producing nations of the United Arab Emirates, Qatar and Norway, and takes many forms. The United Arab Emirates, a major supporter of the Center for Strategic and International Studies, quietly provided a donation of more than $1 million to help build the center’s gleaming new glass and steel headquarters not far from the White House. Qatar, the small but wealthy Middle East nation, agreed last year to make a $14.8 million, four-year donation to Brookings, which has helped fund a Brookings affiliate in Qatar and a project on United States relations with the Islamic world.