The 300 block of H Street NW in the Mount Vernon Triangle neighborhood of Washington, D.C. In the foreground, from right to left, is 307-317 H Street. The Jefferson Apartment Building (built 1899), listed on the National Register of Historic Places, is the building with the fire escape. The taller buildings, from right to left, are barely visible The Sonata (built 2006), Madrigal Lofts (built 2007) and 425 Mass Apartments (built 2008).