Located in the far northeastern edge of the city, Deanwood is one of Washington, D.C.'s oldest, consistently African American neighborhoods. Rooted in slave-based agriculture on white-owned land, the community began its transition from rural to urban development with the 1871 arrival of a branch of the Baltimore and Ohio Railroad along its western boundary. This period after the Civil War offered blacks the opportunity to become landowners. Since this time, many notable Washingtonians of various ethnicities have been residents and frequent visitors to the area. In the early 1920s, it was home to Suburban Gardens, the only permanent amusement park ever to be housed within the city limits. Many of Deanwood's families have lived in the community for generations, which makes it stable and close-knit.

Since its founding in 1651 on the western shore of the Delaware River, New Castle and its residents have shared in the making of American history. Known as the first capital of the first state, this charming town watched European powers clash over its control; welcomed William Penn when he first set foot on American soil; participated in the drama of the Revolutionary War, the War of 1812, and the Civil War; and reaped the benefits of new technologies like the railroad, steam engine, and aviation. Eventually, trade and commerce moved elsewhere, leaving New Castle preserved and intact. Today, the people of New Castle take great pride in their community's heritage and enjoy sharing the story of this National Historic Landmark District with others.