The Folly Castle Historic District, Petersburg, is a one-block residential neighborhood containing fourteen late 18th-and 19th-century houses and one 19th-century church. The district is bounded to the north by the alley north of the houses facing W Washington Street, to the east by Perry and Davis Streets, to the south by the south property line of houses facing W. Washington Street, and to the west by Guarantee and Lafayette Streets. West Washington Street is the only major thoroughfare within the district. The remaining streets are minor residential avenues. - NRHP, 16 July 1980