A mapped dataset and layer of sites and districts identified in the Locational Atlas and Inventory of Historic Sites in Montgomery County, Maryland. The Location Atlas is a list resources that are potentially historic. Resources listed in the Atlas are protected from demolition or "substantial alteration" under Chapter 24A of the County Code. For more information, see http://montgomeryplanning.org/historic/research.shtm. Source: M-NCPPC Planning. https://montgomeryplans.org/arcgis/rest/services/Overlays/HistoricPres_LA_Sites_and_Districts/MapServer/0

A list of properties that are landmarks, are in historic districts, or were recommended for inclusion in a historic district.

,This application, HistoryQuest DC, is an interactive GIS map that provides historical data on approximately 193,000 extant buildings in Washington, D.C. The map offers several operational layers of information for the user including historic data on individual buildings and historic districts, links to documentation on properties listed in the National Register of Historic Places, information on historic residential subdivisions, and the identification and boundaries of the L’Enfant Plan, and the city’s Squares, and Wards. The featured layer in the map—the Historical Data on DC Buildings—provides information from a variety of sources on original dates of construction, architects, owners and builders of the city’s historic buildings. The application also includes a Query tool that allows the user to analyze the historic data within a specified geographic area or city-wide.This application has evolved out of the DC Historical Building Permits Database, begun in 2002, is on-going. Requests to correct or add new information can be made using the “Propose Data Change” drop-down form located on the banner at the top of the map.,,For questions or concerns, contact the Historic Preservation Office at historic.preservation@dc.gov.,,

The National Register of Historic Places recognizes districts, buildings, structures, objects, and sites for their significance in American history, archeology, architecture, engineering, or culture, and identifies them as worthy of preservation. The National Register is a program of the U.S. Department of the Interior, National Park Service, and is administered at the State level by the Maryland Historical Trust. The National Register currently comprises over 1300 listings in Maryland, including some 200 historic districts. Listed properties span a wide variety of types and periods, ranging from prehistoric archeological sites to buildings of the recent past, and include rural landscapes, urban and suburban neighborhoods, bridges, sailing vessels, and more. For more information see http://mht.maryland.gov/nationalregister.html.

The National Register of Historic Places recognizes districts, buildings, structures, objects, and sites for their significance in American history, archeology, architecture, engineering, or culture, and identifies them as worthy of preservation. The National Register is a program of the U.S. Department of the Interior, National Park Service, and is administered at the State level by the Maryland Historical Trust. The National Register currently comprises over 1300 listings in Maryland, including some 200 historic districts. Listed properties span a wide variety of types and periods, ranging from prehistoric archeological sites to buildings of the recent past, and include rural landscapes, urban and suburban neighborhoods, bridges, sailing vessels, and more. For more information see http://mht.maryland.gov/nationalregister.html.

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