The 10-story office building in Washington, D.C. is owned by the federal government of the United States and serves as the headquarters of the United States Department of Housing and Urban Development.  The design resembles that of a giant capital letter "X" with an elongated spine and four bilateral, symmetrical, curving arms. The curvilinear shape allows the maximum amount of natural light to reach the maximum number of offices. A typical feature of Breuer are the deep-set windows in rectilinear shapes. The building was the first Breuer-designed structure in the United States to use a precast concrete facade.

In use. Special thanks to Paul Severance for the hint!