Claim: Dyas Hexagonal Barn was built in 1921 and listed on the National Register of Historic Places since 1986.
Evidence: 1921 It has been listed on the National Register of Historic Places since 1986. 
Built in 1921, it features red horizontal siding, a tin roof and a central wood stave silo that extends through the roof. June 30, 1986 The National Register of Historic Places (NRHP) is the United States federal government's official list of districts, sites, buildings, structures and objects deemed worthy of preservation for their historical significance.