The collection comprises a portion of the records of the Jewish community of Ostrów Wielkopolski, today in west-central Poland, in the Greater Poland Voivodeship. The region was annexed by Prussia in 1793, in the Second Partition of Poland; in German the town was known as Ostrowo. The records date mainly from 1834 to 1919, with a few materials from as early as 1822. During this period the town was part of the Posen (Poznań) region of Prussia and, after 1871, of the German Empire; in 1919, it was incorporated into the Second Republic of Poland. The community numbered nearly 2,000 members in the late 19th century and declined steadily thereafter due to migration of members to larger German cities or overseas; only a small Jewish community remained during the interwar period. The records are mainly those of the Jewish communal administration, or council; a small amount of material pertains to several community voluntary organizations. Included are financial records such as budgets, balance sheets, and tax lists; communal minutes and decisions throughout the period; correspondence with the government, and, to a lesser extent, with Jewish organizations and other Jewish communities; records pertaining to community members' naturalizations, marriages, births, and synagogue seat contracts; petitions from individual community members, especially pertaining to charitable aid in the mid to late 19th century; records pertaining to communal educational and religious institutions; records on the hiring and employment of community rabbis,cantors, and other personnel, including application materials from candidates not hired; property records and mortgages; documentation of construction and renovation of communal buildings; records related to court cases, bequests, and estate and guardianship matters; and ephemera such as meeting notices and announcement fliers, as well as scattered clippings.

This collection contains materials about the Reichsvertretung der deutschen Juden, a federation of Jewish organizations and regional and local Jewish communities, founded in 1933, that aimed to provide a unified voice for German Jewry in dealing with the Nazi authorities. It includes a significant amount of correspondence surrounding the formation of the Reichsvertretung, as well as articles, budgets, clippings, ephemera, leaflets, minutes, reports, and statistics.

The Robert Rifkind Papers document the Jewish philanthropic and lobbying activities of Robert Singer Rifkind. Robert Rifkind was born in New York City in 1936 and became a partner at the law firm of Cravath, Swaine and Moore in 1971. He served on the boards of many Jewish philanthropic and activist organizations, including the American Jewish Committee, the Jewish Theological Seminary and the Schechter Institute for Jewish Studies. The collection includes correspondence, photographs and publications from Rifkind’s involvement in these and other organizations, primarily dating from the 1980s to the 2010s.

The Robison Family Fapers reflect various activities of Adolf C. and Ann Green Robison in civic organizations, Jewish communal life, Jewish national and international affairs, and individually in the arts. The collection contains information on the origins of the United Nations; and on aid to Israel before, during, and after the War of Independence. The materials include correspondence, memoranda, minutes, reports, financial documents, newspaper clippings, photographs, diaries, scrapbooks, musical scores, and play scripts.

This collection contains correspondence, pamphlets, periodicals, newspapers, press releases, writings, clippings, brochures, fliers, and posters from the era of the Spanish Civil War, and later, documenting American and international fund-raising for humanitarian relief of Republican Spain; American and international public opinion about the war; the participation of Jews in the International Brigades; and reminiscences and commemorations of the war and, particularly, of the International Brigades, in later years. A portion of the material on relief work pertains to trade union activities, as documented in papers of Charles S. Zimmerman, of the International Ladies’ Garment Workers’ Union, in his capacity as leader of Trade Union Relief for Spain, in New York City. Other organizations represented include the Medical Bureau and North American Committee to Aid Spanish Democracy; the Spanish Information Bureau in New York; the Friends of the Abraham Lincoln Brigade; and the Israeli branch of the association of volunteers in the International Brigades. There are also autobiographical manuscripts by Benjamin Lubelski and Sigmund Stein, who participated in the International Brigades; and contemporary publications in a variety of languages, including publications of the anarchist-leaning Spanish trade union confederations CNT-FAI.

The collection is of a fragmentary nature, and consists of miscellaneous materials that pertain to the role and activities of the Vilna Chief of Police in the everyday life of the city and province of Vilna, and to the relationship between the Vilna Chief of Police and other police, military and civil organs in the Vilna province. Most of the documents in this collection, which covers the tsarist period from the 1830s to 1918, were assembled during the latter part of the nineteenth and early part of the twentieth century

The Vilna Collection represents fragmentary materials that were part of the original YIVO Archives in Vilna before WWII. The collection includes a wide array of materials dealing with a great variety of aspects of Jewish life in the Pre-revolutionary Russian Empire and post-revolutionary Poland, Ukraine, Lithuania, and Soviet Russia. The Collection consists of personal correspondence, official correspondence with organizations and governmental institutions, financial and statistical reports, minutes of meetings of Jewish communal and political organizations, bibliographic materials, including card catalogues and bibliographies. Also included here are vital documents, such as birth certificates and birth registers, affidavits, certificates, diplomas, and travel documents. Additionally, there are petitions, resolutions, appeals, printed materials, manuscripts, lists, and questionnaires. There is a wealth of materials dealing with Jewish book trade and publishing, youth and sports organizations, education, Jewish communal life, and political activities.

Record Group 1.1, the primary collection of records from the period when YIVO was headquartered in Vilna, reflects the wide range of activities YIVO engaged in from 1925-1941. Founded as an institute for the study of Yiddish speaking Jewry, YIVO grew to become a research institute, library, archive, and graduate program in one. The collection consists primarily of administrative material such as correspondence, financial records, minutes, reports, lists, and newspaper clippings, as well as essays and publications of the Aspirantur, Division of Youth Research, and the Economic-Statistical, Psychological-Pedagogical, and Philological sections. It incorporates material generated by the Vilna office, satellite offices in Berlin, Warsaw, and New York, and by supporters and collectors throughout Poland, Europe, and indeed the world.

The Youth Aliyah Records in the Hadassah Archives document Hadassah's work with multiple international organizations to rescue Jewish children from continental Europe to Palestine from 1933-1945. The collection also documents Hadassah's involvement with Youth Aliyah since 1946 in providing residential, educational, vocational, rehabilitative and therapeutic care for displaced and at-risk youth from around the world.