Image: Photophone plaque (no copyright applies)

Description: An image of a historical plaque on the wall of the Franklin School in Washington, D.C., at 13th & K Streets NW., which marks one of the two building rooftops used by Alexander Graham Bell and Charles Sumner Tainter to conduct the world's first wireless telecommunication. The plaque's text reads: 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 WAS PLACED HERE BY • ALEXANDER GRAHAM BELL CHAPTER • TELEPHONE PIONEERS OF AMERICA • MARCH 3, 1947, • THE CENTENNIAL OF DR. BELL'S BIRTH Four patents were awarded for this technology and invention, which Bell described as his greatest achievement.
Usage Terms: Public domain