This collection contains materials by and about Ofra Core, her husband David Uriel Core, and her father-in-law, the noted German-Jewish and Israeli philosopher Hugo Bergmann (1883-1975). The collection contains correspondence from Hugo Bergmann as well as other materials about him and his family. Materials by Ofra and David Core are also found in this collection, and include a photo album, material about the Japanese religious group Mayuka, and some of Ofra's professional materials from her career as a records manager for the United Nations.