Taken from 101 Things to Do in Shipshewana by Melissa Troyer
If you ask locals the shape of the “Prough Barn,”, they’ll either reply that it is octagonal, or they will answer “round.” Historical records, however, state that it was built by Menno S. Yoder in 1908 as a model for a design of a 12-sided concrete barn that he wanted to sell to farmers. Though Yoder’s barn-making plans didn’t take off, the barn is listed on the National Register of Historic Places and is the only polygonal barn in Indiana that is constructed of a material other than wood. 210 round and polygonal barns were built in Indiana from 1874-1936, perhaps more than any other state. While not open to the public, the barn is interesting to drive by and see; just go one mile west of the Blue Gate Restaurant on Middlebury-Shipshe Road. Choose for yourself whether you’d call it octagonal or dodecangonal. “Round” might be the easiest answer.