Conferences and notable lectures from the 1950s to the 1990s; fellows files; visiting scholars (1960 - 1995); USSR propaganda (books, posters), correspondence, events, alumni files.
The papers comprise correspondence, documents, institutional files, writings, lectures, memoirs, research notes, photographs, third party materials, printed materials, periodicals, microfilms, audio material, and digital files accrued by historian and professor emeritus of Columbia University, Leopold H. Haimson, during his professional life.