The Pentagon The Pentagon The Pentagon, in Arlington County, Virginia, across the Potomac River from Washington, D.C., is the headquarters of the United States Department of Defense. As a symbol of the U.S. military, the phrase "The Pentagon" is often used as a metonym for the Department of Defense and its leadership. The building was designed by American architect George Bergstrom and built by contractor John McShain. Ground was broken on September 11, 1941, and the building was dedicated on January 15, 1943. General Brehon Somervell provided the major motivating power behind the project; Colonel Leslie Groves was responsible for overseeing the
Lyon Village, Arlington, Virginia Lyon Village, Arlington, Virginia Lyon Village is a neighborhood, or "urban village" located in Arlington County, Virginia, along Lee Highway (U.S. Route 29). It adjoins Arlington County's government center (including the courthouse and police/jail complex), and is approximately one mile west of Rosslyn and less than a mile north of Clarendon, of which it is sometimes considered a sub-neighborhood, as is Cherrydale, the mostly residential district immediately west of Lyon Village. The Lyon Village Historic District encompasses 1,073 contributing buildings and 1 contributing structure. The District as a "cohesive residential neighborhood in northern Arlington County, Virginia, located immediately north of