As the oldest and largest construction agency, The U.S. Corps of Engineers has designed and developed key historical structures throughout the United States. Major developments by USACE include the Washington Monument, The Lincoln and Jefferson Memorial, headquarters of The American Red Cross, the Pentagon, and many other building projects. Architects oversee the design, development and review of drawings, manuals, and specifications for various worldwide facilities. Architectural projects include housing facilities, dining facilities, child development centers, hospitals, safety and protection criteria, and historical preservation.