FBI Headquarters (J. Edgar Hoover Building) - WASHINGTON D.C., USA

The J. Edgar Hoover Building is a low-rise office building located at 935 Pennsylvania Avenue NW in Washington, D.C., in the United States. It is the headquarters of the Federal Bureau of Investigation (FBI). The building is named for former FBI Director J. Edgar Hoover. Planning for the building began in 1962, however the construction finished in September 1975

The J. Edgar Hoover Building has 2,800,876 square feet (260,210 m2) of internal space, numerous amenities, and a special, secure system of elevators and corridors to keep public tours separate from the rest of the building. The building has three floors below-ground, and an underground parking garage. The structure is eight stories high on the Pennsylvania Avenue NW side, and 11 stories high on the E Street NW side. 

Two wings connect the two main buildings, forming an open-air, trapezoidal courtyard. The exterior is buff-colored precast and cast-in-place concrete with repetitive, square, bronze-tinted windows set deep in concrete frames.