The Gettysburg Address, written by Abraham Lincoln in less than an hour. The speech took less than five minutes to deliver, and the photographer on the scene didn't capture photos because his camera wasn't ready, as he was expecting Lincoln to talk for at least an hour. Reading the text still gives me goosebumps
November 19, 1863: President Abraham Lincoln delivered the Gettysburg Address at the dedication of a military cemetery in Gettysburg, Pennsylvania during the American Civil War. This is the only known photograph of Lincoln at Gettysburg.