Preservation NC  http://www.presnc.org/

State Historic Preservation Office  http://www.hpo.ncdcr.gov/

National Register of Historic Places https://www.nps.gov/subjects/nationalregister/index.htm

National Parks Service Preservation Briefs— https://www.nps.gov/tps/how-to-preserve/briefs.htm

National Trust for Historic Preservation https://savingplaces.org/