Washington, DC, United States
From the top floor of this building was sent on June 3, 1880 over a beam of light to 1325 L Street the first wireless telephone message in the history of the world. The apparatus used in sending the message was the photophone invented by Alexander Graham Bell, inventor of the telephone This plaque w
as placed here by Alexander Graham Bell chapter Telephone Pioneers of America March 3, 1947, the centennial of Dr. Bell's birth
Listen to the audio guide for Alexander Graham Bell bronze plaque Free on WIP — starts by itself when you arrive, even with the screen off