Ulster-Scot immigrant William Irvine built Hartwood House between 1800 and 1825.   The house was the center of a 5,000 acre plantation that stretched from the Rappahannock River to Warrenton Road.  During the Civil War, the house served as headquarters for both Union and Confederate forces.  The large barn on the property was used as a field hospital for Confederate soldiers.  Today it is used for weddings, receptions, and special events.  (photo:  Hartwood House)