Philosophy Hall National Historic Landmark Designation

National History Landmark plaque
Location: Philosophy Hall Entry Lobby, 3rd Floor, South Wall.

Philosophy Hall
has been designated a
National Historic Landmark
This building possesses national significance
in commemorating the history of the
United States of America

Edwin H. Armstrong developed a series of advances
in wireless communications technology in his second
floor laboratory between 1913 and 1954. These
contributions, which included FM radio, had an
important impact on the history of communications.

National Park Service
United States Department of the Interior