Prehistoric cultural affiliation(s) include Archaic, Woodland, Et Al. and Middle Mississippian dating back to 1000.
Some of the country's most noteable architects helped create the Adair County places including John Barker, Irwin Dunbar, Bonsack and Pierce, Weber & Groves, Ludwig Abt, Leonard F. Poehlman, Robert G. Kirsch, Raymond H. Sanneman, Albert Bartleton Groves and W.M. Geoghegan. Prominent architectural styles found in Adair Country are Romanesque, Italianate and Bungalow/Craftsman.