The Old Slave Market is a building located at 6 Chalmers Street.,Charleston, S.C. It once housed an antebellum slave auction market. It is thought to be the last slave auction facility in South Carolina. It was originally a part of a larger facility known as Ryan Slave Mart.
It was built in 1859. The building style was Gothic Revival Romanesque. It originally measured 44 feet by 20 feet. The front facade had 20 feet octagonal pillars at each end. There was an elliptical arch.
After the facility closed it was converted into a tenement building. A second floor was added. In the 1920’s a car dealer show room operated in the building
