Charles Dugan House  Charles Dugan House, also known as the Adams County Historical Society Museum, is a historic home located at Decatur, Adams County, Indiana. It was designed by the prominent architectural firm of Wing & Mahurin and built in 1902. It is a two-story, Classical Revival style yellow brick dwelling with a hipped roof. The house features a semicircular portico, Doric order corner pilasters, and porte cochere. Also on the property is a contributing frame garage. It was purchased by the Adams County Historical Society Museum in 1968 for $17,250. It was listed on the National Register of Historic Places in 2009.