Roberts Octagon Barn

The Roberts Octagon Barn built in 1883 is an historic octagonal barn located on CR W62 near Sharon Center, Johnson County, Iowa. On June 30, 1986, it was added to the National Register of Historic Places.^[1]

Roberts Octagon Barn
U.S. National Register of Historic Places
Show map of Iowa Show map of the United States
Nearest city	Sharon Center, Iowa
Coordinates	41°35′24″N 91°38′7″W
Area	less than one acre
Built	1883
MPS	Iowa Round Barns: The Sixty Year Experiment TR
NRHP reference No.	86001449[1]
Added to NRHP	June 30, 1986

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.^[2]