Counties in Wisconsin. Twenty one of those barns, including the Harbach Round Barn are within Stephenson County. The Harbach Round Barn is an example of a noteworthy design variation within round barn design, specifically because of its specially braced roof. It is not entirely unique; its cupola and roof make it very similar to the Fehr Round Barn. The main difference in the Fehr and Harbach Round Barns is the Harbach's lack of a central storage silo. The building was added to the U.S. National Register of Historic Places on February 23, 1984 as part of a Multiple Property Submission. See also Charles Fehr Round Barn Dennis Otte Round Barn James Bruce Round Barn Robert Weber Round Barn Notes Barns on the National Register of Historic Places in Illinois Infrastructure completed in 1914 National Register of Historic Places in Stephenson County, Illinois Round barns in Illinois