State, War and Navy Building (Old Executive Office Building; Eisenhower Building): This administrative building is distinguished by its purple-grey Virginia granite walls and slate mansard roofs.

The State, War and Navy Building was built just west of the White House, between 1871 and 1888, to designs by architect Alfred B. Mullett. Like the Greek Revival style Treasury Department Building to the east, on the other side of the White House, the Second Empire/French Renaissance style State, War, and Navy Building is a monumental, isolated rectangle with a transecting wing and two interior courts.

The building is six stories high, with purple-grey Virginia granite walls and slate mansard roofs. Its colossal size and almost unbelievable variety and richness of detail represent the quintessence of vigorous, superscaled late 19th-century architecture.

This building was constructed to create a new permanent home for the overcrowded State, War, and Navy departments. Four future presidents had offices in the building: Theodore Roosevelt as Assistant Secretary of the Navy, William Howard Taft as Secretary of State, Franklin D. Roosevelt as Assistant Secretary of the Navy, and Lyndon B. Johnson as Vice President. 13 Secretaries of the Navy, 21 Secretaries of War, and 25 Secretaries of State had offices in the building. It is now principally occupied by the ever-expanding White House staff, and known as the Eisenhower Executive Office Building or Old Executive Office Building.

DC Inventory: November 8, 1964 (Joint Committee on Landmarks)

National Register: June 4, 1969

National Historic Landmark: November 11, 1971

Within Lafayette Square Historic District