Archenhold Observatory, Astronomical observatory in Alt-Treptow, Berlin, Germany
The Archenhold Observatory houses multiple telescopes, including a 21-meter refracting telescope, making it the longest instrument of its type in the world.
Founded by astronomer Friedrich Archenhold, the facility opened its doors on May 1, 1896, becoming Germany's first public observatory dedicated to astronomical education.
Albert Einstein presented his initial public lecture about the general theory of relativity in 1915 at the observatory's main hall.
The observatory offers guided tours, workshops, and night observations through its collection of telescopes, including a 500-millimeter reflecting telescope for viewing planets.
The main telescope, weighing 130 tons and nicknamed the sky cannon, remains fully operational and ranks among the ten most powerful refractors globally.
Location: Treptow-Köpenick
Official opening: May 1, 1896
Elevation above the sea: 41 m
Website: https://astw.de
GPS coordinates: 52.48600,13.47708
Latest update: May 12, 2025 08:17
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