 The Wisconsin Governor's Mansion is only one of four official State governor's residences in the country that is not located within its State's capital (the others being Drumthwacket, located in Princeton, New Jersey, instead of Trenton; the Ohio Governor's Mansion, located in the suburb of Bexley instead of Columbus; and the Tennessee Governor's Mansion, located in Oak Hill instead of Nashville, Tennessee).Construction began in 1920 for Madison industrialist Carl A. Johnson as a home.Twelve years later, it was purchased by Thomas R. Hefty, a Madison banker, who sold it to the State during 1949 for $47,500.