The Historical Fairfax Courthouse at 4000 Chain Bridge Road was built in 1800. It is a national landmark and was the seat of civil war activity, changing hands from Confederate control to Union control and back several times. The first officer casualty of the Civil War occurred on the grounds here. Captain John Quincy Marr was killed during a skirmish between Union cavalry and the Confederate Warrenton Rifles who were then occupying the courthouse grounds. This courthouse is still in use today and is currently the home of the Fairfax Juvenile and Domestic Relations General District Court & Clerks Office.