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Ernst Warschauer Collection

Identifier: AR 5784

Scope and Content Note

The Ernst Warschauer Collection contains personal and family papers of the Warschauer and Casper families. The first series contains papers directly related to Warschauer; it is composed of his writings, clippings, recommendations, and obituaries.

Series II contains the family papers of Warschauer’s family and the family of his wife Claire Kantorowicz née Casper. The documentation in this series is mostly made up of vital documents, tax declaration forms, passports, citizenship forms, job recommendation letters, and photographs pertaining to the two families. Most of these papers are related to the Casper family rather than the Warschauer family. Many of these papers are also copies of the originals. This series also contains papers related to the Warschauers and Caspers in their efforts to leave Germany and immigrate to the United States. In addition, there are maps and clippings related to where the Warschauer family lived in Silesia.

Series III comprises papers of individuals. Most of the papers in this series are letters between the individuals and Warschauer and clippings and/or drafts of writings by the individuals or obituaries for the individuals. These writings consist of short stories, articles, and poems. The individuals mentioned in this series are Erich Kästner, Carl Landauer, Jacob Picard, Alfred Polgar, Fred B. Stern, and Fritz Wallenberg.


  • 1868-1988
  • Majority of material found within 1919-1972


Language of Materials

The collection is in German, English, Polish, and French.

Access Restrictions

Open to researchers.

Access Information

Collection is digitized. Follow the links in the Container List to access the digitized materials.

Use Restrictions

There may be some restrictions on the use of the collection. For more information, contact:

Leo Baeck Institute, Center for Jewish History, 15 West 16th Street, New York, NY 10011


Biographical Note

Ernst Warschauer was born on May 26, 1889 in Breslau (now Wrocław, Poland). He was the oldest son of Sigismund Warschauer and Emma Warschauer, née Bernstein. In 1912 he received his doctorate in law from the University of Breslau. He married Agathe Karoline Rummler in 1919, whom he later divorced in 1935. Warschauer practiced law in Oels, Silesia until 1933 when laws enacted by the Nazi government prevented him from doing so. He moved to Berlin and married Claire (also known as Klara) Kantorowicz née Casper in 1938. In 1940 the family immigrated to New York, where Warschauer wrote and worked on restitution cases. Warschauer became friends with Julius Bab and kept correspondence with many other writers, including Alfred Polgar and Erich Kästner. Warschauer died on May 8, 1972.


1 Linear Feet


The collection contains personal papers, vital documents, correspondence, and memoirs of two generations of Warschauer and Casper families.

Related Material

For information related to the Warschauer-Casper families and the work of Warschauer, the Ernst Schlochauer Collection (AR 5785) contains many documents. AR 1415 also contains a brief memoir by Warschauer.

Other collections of individuals mentioned in this collection include:

  1. Julius Bab Collection (AR 196)
  2. Jacob Picard Collection (AR 6016)
  3. Carl Landauer Collection (AR 7053)
  4. Alfred Polgar Collection (AR 2738)

Processing Information

Folder ordered rearranged according to topic, the folder contents remain unchanged.

Guide to the Papers of Ernst Warschauer (1889-1972) 1868-1988 AR 5784
Processed by Nicole Greenhouse
© 2011
Language of description
Script of description
Language of description note
Description is in English.
Edition statement
This version was derived from ErnstWarschauer.xml

Revision Statements

  • February 26, 2013 : Links to digital objects added in Container List.

Repository Details

Part of the Leo Baeck Institute Repository

15 West 16th Street
New York NY 10011 United States