The hill is 15 meters high and still stands as a memorial to Lilienthal.

Lilienthal started building and testing gliders in 1891.

Photo credit:Kaiser2102/Wikimedia

In 1892, Lilienthal moved to another hill formation in Steglitz, near Berlin.

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Lilienthal conducted more than a thousand test flights from Fliegeberg, attracting a regular crowd of people.

His best recorded distance at Fliegeberg was 80 meters.

His gliders were carefully designed to distribute weight as evenly as possible to ensure a stable flight.

Original caption: Portrait of Otto Lilienthal — Image by © Bettmann/CORBIS

Lilienthal controlled them by changing the center of gravity by shifting his body, much like modern hang gliders.

This small design flaw proved fatal.

Lilienthal never got a chance to gain control of the glider.

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He fell from a height of 15 meters, breaking his neck.

He died 36 hours later.

His last words to his brother Gustav were “Opfer mussen gebracht werden!”

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(Sacrifices must be made!).

In 1932, the Fliegeberg was redesigned as a memorial to Lilienthal and his training ground became Lilienthalpark.

Otto Lilienthal performing a test flight in 1894.

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Photo credit:www.dlr.de

Otto Lilienthal performing one of his gliding experiments, circa 1895.

Photo credit: Public domain

Otto Lilienthal with his small wing flapping apparatus near to the “Fliegeberg”.

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