The bulk of the collection consists of Benckendorff family correspondence with prominent Russian noble families, documents, and photographs. There are also manuscripts, financial statements and drawings.

This collection consists of a series of diaries and memoirs related to a noble Russian family of Greek/Romanian origin and include an interesting account on daily life before the Bolshevik takeover.

Edmund Stevens (1910-1992) was an American journalist who worked as a foreign correspondent in the Soviet Union from the 1930s until the early 1990s. He won the Pulitzer Prize for international reporting in 1950. The papers include articles, book materials, correspondence, travel notes, reporter notebooks, and photographs.

This is a very important material containing an American view on Russian Imperial court and Russia in general at the end of the 19th century. Coronation album of Nicholas II, diaries, correspondence, and photographs.

This collection illustrates the research process of a distinguished professor, and also brings a great deal of otherwise scattered (in Russian archives) material together on topics of human sexuality in Imperial Russia.

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.