The Carville Historic District in Carville, Louisiana, is a 60-acre (24 ha) historic district that was listed on the National Register of Historic Places on November 18, 1992. It formerly served as a treatment facility for leprosy, and was called the National Leprosarium, Gillis W. Long Hansen's Disease Center and Public Health Service Hospital No. 66. In 1992, the district included 24 contributing buildings and two contributing structures, most built during 1939–1941 by architect/builder . It contains the National Hansen's Disease Museum, a historical museum about the facility.