The collection consists of correspondence, manuscripts and memoirs, documents, minutes of meetings, financial records, photographs, maps, and printed materials. Cataloged correspondents include Grand Duke Nikolaĭ Nikolaevich and General Petr Wrangel. Manuscripts include memoirs by Konstantin Rozen on his military service from 1902-1917, and a memoir by F. N. Bui︠a︡k entitled "Vospominanii︠a︡ starogo kavalergarda 1885-1902." Subject files are on Kadry Voĭsk Ofit︠s︡erov (Cadres of Military Officers) in Belgrade and Soi︠u︡z Russkikh Ofit︠s︡erov (Union of Russian Officers), emigre Russian military organizations. Documents concern Rozen's family and estate in Vitebsk province. Minutes of meetings concern the Kavalergardskai︠a︡ Semi︠́a︡ (Cavalry Guard Family). Financial records cover the fundraising activities of Soi︠u︡z Russkikh Ofit︠s︡erov and the estate. Photographs are of the estate, and maps are of the Vitebsk region and the estate grounds. Printed materials concern the estate and the above mentioned military organizations, and include copies of the news bulletin"Vestnik Kavalergardskoĭ Semí.".