Built by the Weir family in 1825, this Federal-style home is one of the few pre-Civil War dwellings that remains in the area. Once a prosperous 2,000-acre plantation, Liberia had a general store, a post office, and a school, and boasted a successful farm with as many as 80 slaves. During the Civil War, Liberia was headquarters to both Confederate forces under Gen. P.G.T. Beauregard, and Union forces under Gen. Irvin McDowell. Both Confederate President Davis and President Lincoln are believed to have visited. After the war, the plantation was a successful dairy farm, and was donated to the City of Manassas in 1986 by I.J. and Hilda Breeden.