The society’s weekly lectures, which are held in Constitution Hall, have become a part of the intellectual life of the National Capital. Since their inception more than 1,400 explorers, statesmen, and world travelers of note have addressed the Washington meetings. Such explorers as Rear Admiral Peary, Sir Francis Younghusband, Capt. Roald Amundsen, Colonel Lindbergh, and Rear Admiral Byrd have related their findings to the society’s members; also such noted travelers as the late Viscount Bryce, former Ambassador Jusserand, the late William Howard Taft, and Colonel Roosevelt, after his return from his African game hunt and his Amazon expedition. When these lectures are of general interest they are reprinted and illustrated in the magazine for the society’s entire membership. At its Sixteenth Street headquarters the society maintains a library of up-to-date geographic information, comprising some 20,000 volumes, in addition to maps, periodicals, and reports from foreign governments and geographic societies. The leading universities of the city, such as Georgetown University, founded 1789; George Washington University, founded 1821; Catholic University, founded 1889; American University, founded 1893; Howard University, founded 1867; Columbia Institution for the Deaf, founded 1857; and Trinity College, Brookland, founded 1897; also have their monumental buildings. In the Triangle group are to be found: Department of Commerce Building, York & Sawyer, architects; Department of Labor and Interstate Commerce Commission Building, Arthur Brown, architect; Post Office Department Building, Delano & Aldrich, architects; Department of Justice Building, Zantzinger, Borie & Medary, architects; Internal Revenue Building, Louis Simon, architect; National Archives Building, John Russell Pope, architect; Federal Trade Commission (Apex) Building, Bennett, Parsons & Frost, architects. [Illustration: THE TRIANGLE GROUP OF PUBLIC BUILDINGS ALONG CONSTITUTION AVENUE] [Illustration: THE NATIONAL GALLERY OF ART] [Illustration: THE NATIONAL ARCHIVES BUILDING] [Illustration: THE MAKERS OF THE CONSTITUTION] [Illustration: THE SIGNERS OF THE DECLARATION OF INDEPENDENCE]