The collection consists of primary source material (correspondence, photographs, administrative files) related to the life and activities of Dietrich Bonhoeffer, a Lutheran theologian, professor, and member of the German resistance. Includes unique material related to Bonhoeffer's residence at Union Theological Seminary in 1930-1931, such as transcripts, correspondence, and Bonhoeffer's "Deceased Alumnus file" a collection transferred from the UTS Alumnae/i Office. Other highlights include: photographs of Bonhoeffer and the concentration camp at Flossenburg where he was imprisoned; remembrances of Bonhoeffer (correspondence and articles) by his friends and family (mostly copies of originals from Princeton Theological Seminary and the National Lutheran Council); and Bonhoeffer's correspondence with Richard Ern and his family from 1930-1931; Gift Books inscibed by Bonhoeffer and an account by Paul Buesing of his study and contact with Bonhoeffer at the Finkelwalde Seminary.

Correspondence includes letters, 1865-1891, from the American Bible Revision Committee and the British Committee on Bible Revision; notes and lectures; travel diaries, 1844-1890; photograph album; and scrapbook.