Karl Wilhelm Otto Lilienthal (23 May 1848 – 10 August 1896) was a German pioneer of aviation who became known as the "flying man".
He was the first person to make well-documented, repeated, successful flights with gliders.
Newspapers and magazines published photographs of Lilienthal gliding, favorably influencing public and scientific opinion about the possibility of flying machines becoming practical.
On 9 August 1896, his glider stalled and he was unable to regain control.
Falling from about 15 m (50 ft), he broke his neck and died the next day, 10 August 1896.