[1] [5] Auburn is a two-story brick building, with a Palladio exterior and Regencia interior, constructed of a central core and flanking symmetrical wings.

A four-column temple front adorns the center of the block, with modified Ionic columns supporting an entablature and fully pedimented gable.

[4] In 1811, Lyman Harding, the first Attorney General of Mississippi, hired Levi Weeks, a young architect, to design and build the mansion.

Duncan later abandoned the building amidst growing secession tensions just before the American Civil War, and the house was placed in the care of his descendants.

The building and 203 acres (82 ha) was donated by the family to the city of Natchez in 1911 and is now a historic house museum in a public park.