Lansdowne, also known as Retreat Farm and Backus House, is a historic home located near Fredericksburg, in Spotsylvania County, Virginia.

The property is very near the Fredericksburg and Spotsylvania National Military Park.

It is a 1+1⁄2-story, three-bay, side gable-roofed, double-pile, wood-framed dwelling.

Also on the property are the contributing board-and-batten, side-gabled frame bank barn (1920s), a cinderblock spring house and cinderblock pumphouse with an early pump (c. 1950), the remnants of a mid-19th century historic formal landscape including terracing, and an historic road trace.

This article about a property in Spotsylvania County, Virginia on the National Register of Historic Places is a stub.