Philadelphia, PA, United States
John Nepomuk Maelzel (1772-1838). German-born inventor and showman; exhibited nearby at Maelzel's Hall, 1826-1831, assisted by Wm. Schlumberger. His Automaton Chess Player (The Turk) was famous for games with Franklin & Napoleon. He patented a metronome; made hearing aids for Beethoven.
Listen to the audio guide for Johann Nepomuk Maelzel blue plaque Free on WIP — starts by itself when you arrive, even with the screen off