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Henry County Ohio Historical Society The Henry County Historical Society formed in 1970 to protect preserve and perpetuate the history of Henry County Ohio to learn about and preserve the artifacts of the county and to generate interest in the past of the county. Today the HCHS operates two historic museum sites in Napoleon Ohio. The first being the Historic Complex at the Henry County Fairgrounds. This site contains several historic buildings and structures include the Nathaniel Hartman Log Home c.