Brunner, Lotte, 1883-1943

This collection documents the life of Eduard Rudnicki, also known as Eli Rottner, a follower and friend of Constantin Brunner. Throughout his life he was devoted to spread Brunner's and Spinoza's philosophy. This collection shows not only his personal and intellectual life, but exposes his relationship to Brunner, to the Brunner circle and the Internationaal Constantin Brunner Instituut in The Hague. Correspondence between Rudnicki and Brunner and several other known Brunnerians are included, as well as a large amount of manuscripts and newspaper clippings written by Rudnicki and others about and dedicated to Constantin Brunner and Baruch de Spinoza. There is also a photo collection of Rudnicki, Brunner and his circle to be found.

This collection documents the life and work of Frederick (Fritz) Ritter, an actor, writer, and academic. Included are manuscripts of published and unpublished writings, articles, reviews, clippings, notes, personal documents, and photographs.

The Max Busyn collection centers on material about the German-Jewish philosopher Constantin Brunner and the circle of devotes around him. The collection consists primarily of essays and correspondence between several followers of Brunner, who tried to reactivate the circle and to republish Brunner's work in the 1950s and 1960s after the Nazis had destroyed it.

Correspondence between Constantin Brunner, Lotte Brunner, Walter Bernard, and Yehudi Menuhin.