Designed by Robert Mill, the circa 1823 Williamsburg County Courthouse stands on land that had served as the original parade and muster grounds for the militia during the Colonial and Revolutionary War periods. A fine example of Roman Neo-Classic design, it has a raised first floor, a pediment with lunette, Doric columns, and 30-inch fireproof walls that helped it survive a second-story fire in 1883. In 1901, a substantial fence around the courthouse created a public square and hindered the entrance of horses and cattle, and in 1953-54 the building underwent substantial remodeling while still reflecting much of Mill's original design. The Kingstree Historic District contains 48 properties, including the courthouse, public library, and railroad station, along Main Street, Academy Street, and Hampton Street in the commercial area of downtown. With the exception of the courthouse, most of its buildings were constructed between 1900 and 1920, when Kingstree prospered as a retail and tobacco marketing center of Williamsburg County, and they preserve a fine collection of late nineteenth-century vernacular commercial architecture with features such as arched doorways and windows, cast-iron columns and pilasters, and pressed interior ceilings. The district remains substantially intact as a visible record of that twenty-year growth.