Claim: Franklin County is home to the Herman Wood Round Barn, built out of clay tile by Herman Wood in 1616 with Matt King as supervisor.
Evidence: The Herman Wood Round Barn is a historic building located near Iowa Falls in rural Franklin County, Iowa, United States. The barn is constructed of clay tile and features a 20-foot (6.1 m) silo that extends through the flat roof. It was built in 1916 by Herman Wood as a cattle barn. Matt King of the Permanent Buildings Society of Des Moines acted as the building consultant. King designed the system and wrote an article concerning the barn's construction in a 1917 issue of American Carpenter and Builder.