| Adolf Cluss: German-born, he became the most influential architect in Washington, DC, in the late 19th century. Includes biography, photos and information on a centenary exhibition and other events planned in 2005. English and German. |
| Art Deco Society of Washington: Supports the preservation of Art Deco architecture. Membership, events, preservation news, description and history. |
| Emporis: Washington: Focusing on city architecture, especially tall buildings (over 12 stories tall), this site has basic facts and data on notable structures in the DC metro area, searchable by building name, type or locality. |
| Great Buildings Online: Architecture of Washington, DC: Basic information on notable structures and their architects, with photos, commentary and bibliography. |
| Intricate Details: Dupont Circle Architecture Photography Project: Photographs of architectural details of buildings in the Dupont Circle area. |
| L'Enfant Trust: Promotes Washington's historic architectural heritage through a program of conservation easements, educational programs, preservation assistance, and tree planting. Includes information about conservation easements and a list of properties on which easements are currently held. |
| Latrobe Chapter, Society of Architectural Historians: Metropolitan Washington, DC, chapter of the national organization devoted to the study of architectural history. Includes membership and events information. |
| National Register Travel Itinerary: Virtual tour of historic buildings via clickable map or list from the National Parks Service. Photographs and histories with visitor information. |
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