The Avery Brundage Collection, 1908-75, is the preeminent North American source for the study of the modern Olympic movement. It includes extensive files on the International Olympic Committee and its members, publications, circular letters, minutes and committees; National Olympic Committees; sports federations and organizations; the Amateur Athletic Union; U.S. Olympic Association and Committee; Olympic Games and regional games; over 100 scrapbooks; speeches; and periodicals. The Brundage Collection is supplemented by the Frederick Ruegsegger Collection, 1950-75, containing the papers of Brundage’s chief advisor.