The Old Rock Gaol in downtown Greensboro was built about 1807 after the Superior Court of Greene County recommended a substantial jail be built. The jail, patterned after European bastilles, was built with using granite from a local quarry. With walls that are two feet thick, the jail has the distinction of being the oldest standing masonry jail in Georgia. The jail was used until 1895. Open by appointment, visitors can see where executions by hanging took place. Hangings were legal in Georgia from 1735 to 1924.