Collection is composed of 69 lantern slides dating from approximately 1888 to 1950. The majority of the slides are photographs of paintings by John Hafen. There are also two slides of a painting by Rose Hartwell and two slides of paintings by John Hafen's son, Virgil Hafen. There are also two portraits on John Hafen, one by Will Vawter and the other photographer not identified. There is also a photograph taken by George Edward Anderson of John Hafen's son, Joseph, and John's wife, Thora.

Contains object worksheets, provenance records, and correspondence concerning the Weissenbach collection. Materials date from approximately 1978.

The personal and professional papers of Minerva Teichert, along with the personal papers of Herman Teichert, Laurie Teichert Eastwood, and Marian Eastwood Wardle, as they relate to Minerva Teichert.

Contains letters and postcards to Teichert from Minerva Teichert between 1910 and 1919.

Consists mainly of letters, postcards, photographs, and personal ephemera that relate to Teichert's life with his wife, Minerva Kohlhepp Teichert.

Contains funeral programs, marriage licenses, medical and family histories, and research materials on the time Minerva Teichert spent in Chicago and New York studying art. There are also some greeting cards and notes from speeches given by Minerva Teichert.

Contains the research materials and letters of Laurie Teichert Eastwood and Marian E. Wardle regarding their work on Minerva Teichert. Also includes some related ephemera.

Contains published materials, research materials, and ephemera relating to Minerva Teichert's family history, life, and artwork. Some of the materials are about her family and professional life and include materials such as interviews with family members, professional agreements, and family history papers.

Contains manuscripts and research for a book about Minerva Teichert. The research includes emails with family members and a family history timeline of challenges the Teichert and Kohlhepp families faced.

Contains notes and manuscripts about Minerva Teichert, letters, photocopied sketches that museums own, letters, and clippings about Minerva Teichert's art and life.