The Roberts Octagon Barn built in 1883 is an historic

octagon In geometry, an octagon () is an eight-sided polygon or 8-gon. A '' regular octagon'' has Schläfli symbol and can also be constructed as a quasiregular truncated square, t, which alternates two types of edges. A truncated octagon, t is a ...

al barn located on CR W62 near Sharon Center, Johnson County,

Iowa Iowa ( ) is a U.S. state, state in the upper Midwestern United States, Midwestern region of the United States. It borders the Mississippi River to the east and the Missouri River and Big Sioux River to the west; Wisconsin to the northeast, Ill ...

. On June 30, 1986, it was added to the

National Register of Historic Places The National Register of Historic Places (NRHP) is the Federal government of the United States, United States federal government's official United States National Register of Historic Places listings, list of sites, buildings, structures, Hist ...

. In 1986 it was believed to be one of the oldest surviving round barns in Iowa. It appears to be a "Coffin-type octagon barn" (i.e. derivative of the first octagon barn built in Iowa, in 1867, by Lorenzo Coffin). This type includes having a non-self-supporting modified hip roof, heavy timber construction, a rectangular interior plan, and general purpose function. with

References

External links

Dale Travis' Iowa Round Barns List

Buildings and structures completed in 1883 Buildings and structures in Johnson County, Iowa Octagon barns in the United States Barns on the National Register of Historic Places in Iowa National Register of Historic Places in Johnson County, Iowa {{JohnsonCountyIA-struct-stub