It's a decommissioned East German IL-62 airliner named Lady Agnes which landed at Gollenberg, Germany in 1989 to be put on exhibit there...
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Gollenberg is considered the "oldest airfield in the world" as Otto Lilienthal, a German aviation pioneer, was the first person to make well-documented, repeated and successful glider flights there in the late 1800s...
Cheers! M2