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Historic and residential architecture

New Orleans is world-famous for its abundance of architectural styles that reflect the city's multicultural heritage. Though New Orleans possesses numerous structures of national architectural significance, it is equally, if not more, revered for its enormous, largely intact (even post-Katrina) historic built environment. Twenty National Register Historic Districts have been established, and fourteen local historic districts aid in preservation. Thirteen of the districts are administered by the New Orleans Historic District Landmarks Commission (HDLC), while one—the French Quarter—is administered by the Vieux Carre Commission (VCC). Additionally, both the National Park Service, via the National Register of Historic Places, and the HDLC have landmarked individual buildings, many of which lie outside the boundaries of existing historic districts.

Housing styles include the shotgun house and the bungalow style. Creole cottages and townhouses, notable for their large courtyards and intricate iron balconies, line the streets of the French Quarter. American townhouses, double-gallery houses, and Raised Center-Hall Cottages are notable. St. Charles Avenue is famed for its large antebellum homes. Its mansions are in various styles, such as Greek Revival, American Colonial and the Victorian styles of Queen Anne and Italianate architecture. New Orleans is also noted for its large, European-style Catholic cemeteries.