The Thomsen Round Barn was an historical building located near Armstrong in rural Emmet County, Iowa, United States. It was built in 1912 as a dairy barn. The building is a true round barn that measures in diameter. The first floor is constructed of concrete and the second floor consists of white vertical siding. It features a two-pitch conical roof, and a central silo. The barn was listed on the National Register of Historic Places since 1986. As of July 21, 2014 it is no longer standing.

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Infrastructure completed in 1912

Buildings and structures in Emmet County, Iowa

Barns on the National Register of Historic Places in Iowa

Round barns in Iowa

1912 establishments in Iowa

National Register of Historic Places in Emmet County, Iowa

Thomsen Round Barn