The Historical Society of Washington, D.C., also called the DC History Center, is an educational foundation dedicated to preserving and displaying the history of Washington, D.C. The society provides lectures, exhibits, classes, and community events. It runs a museum, library, and publishes the journal Washington History. It had been named The Columbia Historical Society from its founding in 1894 until 1988.
The society's home is the Carnegie Library of Washington D.C., a Beaux-Arts building in the center of Mount Vernon Square in Washington. It was built in 1902 to be District of Columbia Public Library, one of the many Carnegie libraries. The building is open to the public from Monday through Sunday 10am to 5pm. Visitors can tour the exhibits and use the society's Kiplinger Research Library, which has books, maps, photographs, and other materials relevant to the history of the city.