Thomas Johnson Polygonal Barn

The Thomas Johnson Polygonal Barn was a historic building located near Wellman in rural Washington County, Iowa, United States. The 16-sided building measured 40 feet (12 m) in diameter.[2] The structure was covered in red vertical siding and it was topped by a sectional conical roof, with windows on the south side and an aerator. The numerous windows and the 15 hog pens that were around its perimeter suggests that this was built as a hog barn as light and ventilation in hog barns were a concern in the early 20th-century.[3] It was listed on the National Register of Historic Places in 1986.[1] The barn has subsequently been torn down, and it was removed from the National Register in 2014.[4]

Thomas Johnson Polygonal Barn
Formerly listed on the U.S. National Register of Historic Places
Location	Off Iowa Highway 114, Wellman, Iowa
Coordinates	41°26′21″N 91°49′44″W
Area	less than one acre
Built by	Thomas Johnson
MPS	Iowa Round Barns: The Sixty Year Experiment TR
NRHP reference No.	86001451[1]
Significant dates
Added to NRHP	June 30, 1986
Removed from NRHP	December 19, 2014

References

1. "National Register Information System". National Register of Historic Places. National Park Service. April 15, 2008.
2. Dale Travis. "Iowa Round Barn List". Round Barns & Covered Bridges. Retrieved 2011-02-02.
3. "Thomas Johnson Polygonal Barn". National Park Service. Retrieved 2017-11-15. with photo
4. "National Register of Historic Places Program: Weekly List". National Park Service. Retrieved 2017-11-15.