Virginia: Tidewater and Piedmont » Northern Virginia » Fairfax and Prince William Counties » City of Fairfax » Old Jail Old Jail Details 1886–1891. 10459 Main St. (behind original courthouse) Illuminating an earlier and perhaps more genial time, this former jail is essentially a T-shaped house. The front porch, with its elaborate Italianate details, actually welcomes the visitor. Writing Credits Author: Richard Guy Wilson et al.