The Historic District Landmarks Commission (HDLC) is responsible for preserving and protecting the architectural character of the City of New Orleans through the regulation of locally designated historic districts and landmarks. The jurisdiction of the commission includes all exterior architectural features of structures within their respective areas. Beginning in 1976, the commission conducted a series of surveys of designated historic districts, and a few neighborhoods that were being considered for historic designation. Researchers can consult the surveys and accompanying slides for information about existing structures. HDLC materials are available to view in the City Archives by appointment.