Rosalie Mansion, Federal-style mansion in Natchez, United States

Rosalie Mansion is a three-story brick building with a truncated hip roof and a low balustrade, located at Orleans and South Broadway Streets southwest of downtown Natchez, overlooking the Mississippi River. Its front facade has a four-column Tuscan portico with a gabled pediment and a semi-oval window; a five-column portico spans the rear.

Peter Little, a wealthy cotton broker, built Rosalie in 1823 on a bluff above the Mississippi, on part of the site of the 1729 Natchez revolt at Fort Rosalie. On July 13, 1863, a week after the Siege of Vicksburg, Maj. Gen. Ulysses S. Grant took possession of the house as U.S. Army headquarters; Gen. Walter Q. Gresham kept his headquarters there from August 26, 1863. It was named a National Historic Landmark in 1989.

The Mississippi State Society Daughters of the American Revolution has owned and operated Rosalie as a historic house museum for more than seventy years. The name comes from the colonial Fort Rosalie that once stood on part of the site. During the Union occupation, General Walter Q. Gresham had the owner's furnishings stored in the attic under guard to prevent theft or destruction.

Rosalie Mansion stands at the corner of Orleans and South Broadway Streets, southwest of downtown Natchez, on the bluff above the Mississippi River. The house is operated as a historic house museum by the Mississippi State Society Daughters of the American Revolution, which has maintained it for more than seventy years. Visitors enter through the ground-floor double-leaf doors beneath the four-column Tuscan portico; the second-floor balcony is reached from the center bay.

Rosalie stands on part of the site of the 1729 Natchez revolt at Fort Rosalie, a French post destroyed in the uprising. The present house, built for cotton broker Peter Little, keeps that older name. During the Union occupation, soldiers were posted on the widow's walk atop the roof to watch the Mississippi River.