The fonds consists of microform and digital copies of archival records documenting the history and genealogy of Mennonites in Prussia, Russia, and North America. Included are the Molotschna Colony Census file (1835) documenting a Mennonite settlement in Russia; excerpts from the Guardianship Committee of Foreign Settlers in South Russia fonds (1799-1833) documenting early Mennonite relations with the government of Russia; Ulrich Dueck fonds (ca. 1950-ca. 2001) describing genealogies of Mennonite families in West Prussia; Tim Janzen's historical map collection (1914-2005) documenting the locations of Mennonite colonies in West Prussia and southern Russia (1914-1921) including a partial transliterated index to place names (2005); and the Herman Thiessen fonds (ca. 1950-ca. 2001) describing the Thiessen family genealogy.