The Auburn mansion in Natchez, Mississippi is an antebellum structure constructed around 1812. It was the first planned building in town, designed and built by Levy Weeks for Lyman Harding, who was the first Attorney General of the state.

When Harding passed away in 1820, the house was bought by Dr. Stephen Duncan, who added two wings to the house to expand interior space. It was then abandoned before the Civil War and was left to Duncan?s descendants. The property stayed in the family until 1911, when it was sold to the city, along with its 222 acres of land area.

Listed as a National Historic Landmark, the Auburn mansion is now open as a house museum inside the Duncan Park, both of which are open to the public.