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16th Street Northwest, briefly known as the Avenue of the Presidents, is a prominent north-south boulevard in Washington, D.C., located in Northwest D.C. The street was laid out as part of the 1791 L'Enfant Plan, which served as the original blueprint for the city. The street begins just north of the White House, across from Lafayette Square in the President's Park, and continues north along the Washington meridian until Blair Circle.
The street passes through several notable landmarks and thoroughfares, including K Street, Scott Circle, Meridian Hill Park, Rock Creek Park before crossing Eastern Avenue into Silver Spring, Maryland, where it ends at Georgia Avenue. From K Street to the District line, it is part of the National Highway System, while the Maryland portion is designated Maryland Route 390. The entire street is 6.4 miles (10.3 km) long. Part of the street is listed on the National Register of Historic Places as Sixteenth Street Historic District. From June 2020 to March 2025, the section immediately north of the White House was known officially as Black Lives Matter Plaza, featuring a large-scale mural of the wordmark on the street.